Nature — Spain — NextOnTrip

Cova des Fum

Formentera

Cova des Fum is a karst cave carved into the cliffs of La Mola on Formentera, tucked into one of the island's most remote corners. It sits on the northwestern slope of the cliffs, between Punta de sa Palmera and Punta del Torrent des Gat, roughly 75 meters above sea level. Archaeologically, it is considered the most significant cave on the entire island, though its difficult access means few visitors ever reach it. How was the cave formed? Cova des Fum is a karst cavity hollowed out of the limestone mass that forms the La Mola plateau. Inside, a system of galleries shows clear signs of erosion and sediment deposits built up over long periods. The entrance is partly obstructed by blocks that collapsed from the roof, and traces of three ancient defensive walls survive between them. The main chamber has a floor covered by a layer of sand of marine and dune origin, its thickness varying from spot to spot. What has been found inside? Excavations at Cova des Fum have produced some of Formentera's most significant archaeological finds. Fragments of bell-beaker pottery from the Eneolithic period turned up here — a rare find in the Balearics outside Mallorca. Bronze Age material includes a barbed arrowhead, bone points, and a fragment of an archer's wrist guard, alongside plain ceramic bowls from several prehistoric periods. Human remains were also recovered from the inner chambers, pointing to the cave's use as a burial site during the Bronze Age. Medieval Andalusian ceramics dating from the 10th to 13th centuries — jugs, glazed vessels, and oil lamps — show that the cave continued to be used by the island's Muslim inhabitants, likely as a fortified refuge, a use supported by the remains of defensive walls near the entrance. Where does the name and the smoke legend come from? "Cova des Fum" translates literally as "Cave of Smoke." A local legend attached to the name tells of a clash in the year 1108, when the Norwegian prince Sigurd, on his way to the Holy Land, is said to have fought Muslim defenders holed up in the cave and defeated them by smoking them out of their hiding place. The episode belongs to legend rather than documented history, but it captures the cave's real role as a defensive stronghold during the period of Andalusian rule over the Pitiusic Islands. Can you actually get there? Reaching Cova des Fum is genuinely difficult, which is the main reason it remains obscure even among visitors who know Formentera well. From land, a steep, winding path drops down the cliff face to the entrance, demanding good physical condition and careful footing the whole way. Approaching from the sea is considered just as demanding. Given the terrain, this is a destination better suited to visitors prepared for rugged cliffside hiking than to casual sightseers. Frequently Asked Questions Is Cova des Fum easy to reach? No. There is no marked trail, and reaching it means descending a steep, winding path down the La Mola cliffs, or making an equally difficult approach from the sea. What makes this cave archaeologically important? Its finds span Eneolithic bell-beaker pottery, Bronze Age tools and weapons, and medieval Andalusian ceramics, making it the most significant archaeological cave site on Formentera. Where does the cave's name come from? From the Catalan word "fum" (smoke), tied to a local legend about a 1108 clash in which smoke is said to have decided the outcome. Were burials found inside the cave? Yes, human remains recovered from the inner chambers indicate the cave was used as a burial site during the Bronze Age.

Cova des Càrritx

Ciutadella

Cova des Càrritx is an archaeological cave set on the western slope of the Algendar ravine, within the municipality of Ciutadella de Menorca on the island of Menorca. Discovered in 1995 by local cavers Pedro Arnau and Josep Marquez, it has become one of the most significant prehistoric sites in the Balearic Islands, prized for its well-preserved traces of ritual and funerary use spanning thousands of years. What does the cave look like inside? The cave extends for roughly 170 metres and is made up of seven interconnected chambers linked by narrow passages. Its interior is decorated with numerous stalactites and stalagmites, and the entrance was once sealed by a cyclopean wall — a construction of large, roughly hewn stone blocks typical of the island's prehistoric architecture. What traces of the past have been found here? Research has shown that the cave saw human activity across several distinct periods: the late Chalcolithic (end of the 3rd millennium BC), the Bronze Age (2nd millennium BC), and again during the Almohad period in the 13th century AD. The Bronze Age phase carries the greatest significance, when the cave served as a site for rituals and burials. In one of its more hidden chambers, numbered 5, archaeologists uncovered an unusual deposit: wooden containers and horns filled with locks of human hair. That very deposit later became the basis for a landmark scientific study. Why is Cova des Càrritx internationally known? Chemical analysis of the preserved hair allowed researchers to detect psychoactive substances consumed by Menorca's inhabitants roughly 3,000 years ago. The findings are considered the first direct evidence of drug consumption in prehistoric Europe, turning Cova des Càrritx into a reference point in archaeology and in the study of prehistoric ritual practices. Who should visit this site? Cova des Càrritx appeals mainly to visitors interested in archaeology, prehistory, and Menorca's natural heritage. Given the scientific importance of the site and the sensitivity of its finds — including human remains — access can be restricted or may require prior arrangement; this is not a typical open-access tourist cave but a site of considerable research value. The surrounding Algendar ravine itself makes for a worthwhile stop when exploring the island's western countryside. Frequently Asked Questions Where is Cova des Càrritx located? The cave lies on the western slope of the Algendar ravine, within the municipality of Ciutadella de Menorca, in the western part of the island. When was the cave discovered? Cova des Càrritx was discovered in 1995, when cavers Pedro Arnau and Josep Marquez located a small entrance opening on the ravine's slope. What makes Cova des Càrritx different from other caves on Menorca? It stands out for its multiple phases of use dating back to the Chalcolithic and Bronze Age, and for the hair deposit that provided some of the earliest evidence of drug consumption in prehistoric Europe. Can visitors explore the cave on their own? Because it is a sensitive archaeological site containing delicate finds, access can be limited — it's worth checking current visiting conditions locally or through a guide before planning a visit.

Cueva de Chaves

Casbas de Huesca/Casbas de Uesca

Cueva de Chaves is an archaeological cave near Casbas de Huesca (Casbas de Uesca), in the province of Huesca, Aragón, at the foot of the Sierra de Guara, close to the small village of Bastarás. It ranks among the most significant Neolithic sites on the Iberian Peninsula, second in importance only to the Cova de l'Or in Alicante, according to specialists in Iberian prehistory. Why does this cave matter to archaeologists? Excavations that began in 1975 uncovered nearly 15,000 years of intermittent human presence, spanning the Upper Solutrean, the Upper and Final Magdalenian, and later the Neolithic. It's the Neolithic layer that draws the most attention: material dated to roughly 7,500 years ago documents some of the earliest farming and herding communities on the Iberian Peninsula, capturing the shift from hunting and gathering toward settled agricultural life. The site also forms part of the Mediterranean Basin rock art ensemble on the Iberian Peninsula, inscribed on the UNESCO World Heritage List in 1998. What happened to the cave in 2007? The site's history took a dark turn in 2007, when the landowner allowed heavy machinery onto the property, causing damage that turned part of the cave into a watering trough for livestock. At that point archaeologists had studied only around 10 percent of the deposit; much of the Neolithic material was destroyed or dumped into a nearby ravine, leaving mainly Palaeolithic remains intact. The case ended up in the courts, and Aragón's heritage authorities spent years pursuing legal action to restore access to a site that had been largely off-limits due to private ownership disputes. Can visitors go inside today? Yes. After roughly two decades of restricted access, Cueva de Chaves has reopened to the public through organized guided visits led by archaeologists on a recurring basis. Several dozen visitors have already toured the cave since access resumed, making it a rare chance to see a site that was closed to the wider public for so long, and that now plays a role in explaining the prehistory of the Huesca region to visitors. Where can I see finds from the cave? Some of the objects recovered from Cueva de Chaves, including a ceramic vessel, are held at the Museo de Huesca in the provincial capital. The cave itself sits within the limestone landscape of the Sierra de Guara, an area known for its gorges and canyons, which makes Casbas de Huesca a good base for combining prehistoric heritage with the natural scenery of the Pre-Pyrenees. Frequently Asked Questions Where exactly is Cueva de Chaves located? In the municipality of Casbas de Huesca, in the province of Huesca, Aragón, near the village of Bastarás, at the foot of the Sierra de Guara. Why is the site considered so important? It preserves nearly 15,000 years of occupation, and its Neolithic layer, dated to about 7,500 years ago, is among the earliest evidence of farming and herding communities on the Iberian Peninsula, ranking second only to Cova de l'Or in overall significance. What happened to the cave in 2007? The landowner allowed excavation works that partially destroyed the deposit, turning it into a livestock watering point; only about 10 percent of the site had been studied by then. Is it possible to visit Cueva de Chaves now? Yes, guided visits accompanied by archaeologists have resumed after years of restricted access, though visiting arrangements remain regulated and worth checking in advance.

Cueva de Montesinos

Ossa de Montiel

Cueva de Montesinos is a limestone cave near Ossa de Montiel, in the province of Albacete, in the region of Castile-La Mancha, Spain. Its fame reaches well beyond speleology circles — this cave is the setting for one of the most debated episodes in Spanish literature, making it a required stop for anyone tracing the footsteps of Cervantes' most famous character. What is the cave's connection to Don Quixote? In Part Two of Cervantes' "Don Quixote," the knight has himself lowered by rope into the depths of this cave, where he falls asleep and experiences a vivid, fantastical vision of an enchanted underground world. The episode is famous precisely because Cervantes never resolves whether Don Quixote truly dreamed the vision or actually lived it — a deliberate ambiguity that has kept scholars and readers debating for centuries. For fans of the novel, standing at the mouth of the real cave that inspired this passage adds a tangible layer to one of literature's most imaginative scenes. What can be found inside the cave? At the lowest point of the cave lies a small lake, fed by rainwater that filters down through the rock. Hydrological studies have traced an underground connection between this lake and the Lagunas de Ruidera, the well-known chain of natural lakes nearby. That link explains why water levels inside the cave respond to broader hydrological changes across the area, and it makes the site a notable example of the karst formations characteristic of this part of Spain. Where is the cave located, and what's the surrounding landscape like? Cueva de Montesinos sits close to the Lagunas de Ruidera Natural Park, a protected area famous for its cascading turquoise lakes separated by natural travertine barriers. The surrounding countryside is rugged and rural, with dry, stony hills giving way to green pockets around the water. That contrast between the harsh plains of La Mancha and the vivid color of the lakes is a large part of what draws visitors here — some chasing literary history, others simply the scenery. What should travelers know before visiting? Because the cave sits within an ecologically sensitive karst area connected to the Lagunas de Ruidera water system, access inside is often managed to protect the site and the water quality it shares with the surrounding lakes. It's worth building a visit around the wider Ruidera area, pairing the Cervantes connection with walks along the lake trails nearby. The cave rewards both literature enthusiasts retracing Don Quixote's steps and travelers with an interest in karst geology and the quieter landscapes of central Spain. Frequently Asked Questions Is Cueva de Montesinos a real place or just a fictional setting? It's a real cave in the municipality of Ossa de Montiel — Cervantes used an existing geographical location as the backdrop for Don Quixote's fictional adventure. How is the cave connected to the Lagunas de Ruidera? Studies have shown an underground water link between the small lake inside the cave and the Lagunas de Ruidera lake system, tying the cave into the same hydrological network. Is it worth combining a visit to the cave with the rest of the area? Yes — its proximity to the Lagunas de Ruidera Natural Park makes it easy to pair with a longer visit that combines the literary history with the natural lake trails nearby. Who is this destination best suited for? Primarily readers and fans of Cervantes' work, though anyone interested in karst landscapes and the rural scenery of La Mancha will find it worthwhile too.

Ursalto-ko koba II

Arruazu

Ursalto-ko koba II is a cave in the municipality of Arruazu, in Navarre, in the Basque Country of Spain. It sits in the Aralar mountain range, near the Uztoki farm buildings, along the road that runs from Lakuntza toward the Aralar forest house. It is one of two neighboring caves sharing the Ursalto name — its counterpart, Ursalto-ko koba I, lies in the same spot nearby. What does Ursalto-ko koba II look like? The cave has a small entrance, and inside visitors find numerous broken stalactites, evidence of the natural karst processes that have shaped the site over thousands of years. Navarre, and the Aralar range in particular, is rich in karst terrain: the limestone bedrock has produced countless caves, sinkholes and underground passages across the area, and Ursalto-ko koba II is one of the smaller but recognizable examples of this kind of formation in the region. How do you get to the cave? Ursalto-ko koba II lies close to the Uztoki farm buildings, along the route connecting the village of Lakuntza with the forest house higher up in the Aralar range. This stretch is a popular hiking corridor — trails heading from Lakuntza toward Aralar pass near the cave, and the surrounding area also holds other landmarks of scenic and archaeological interest, including a nearby dolmen. For anyone walking the broader route through the area, the cave makes for a natural stop between Lakuntza and the higher ground of Aralar. What should you know before visiting? The cave is a natural, undeveloped site with no lighting or marked visitor paths, so anyone planning to go inside should bring their own light source and suitable footwear. The surrounding terrain is mountainous and damp, typical of the Aralar landscape, so visitors should be prepared for the changeable weather conditions common to this part of the Basque mountains. Why visit the area around Arruazu? Arruazu is a small village at the foot of the Aralar range, one of Navarre's most recognizable mountain areas. The region combines striking natural features — extensive karst landscapes, beech forests and upland pastures — with cultural heritage that includes traces of shepherding and megalithic settlement. Small caves like Ursalto-ko koba II are part of this broader landscape mosaic, one that draws hikers, cavers and nature enthusiasts alike. Frequently Asked Questions Is Ursalto-ko koba II set up for visitors? No, it is a natural site with no tourist infrastructure — there is no lighting, handrails or marked routes, so entering requires your own equipment and caution. How do you reach the cave from Lakuntza? The cave lies along the route from Lakuntza toward the forest house in the Aralar range, near the Uztoki farm buildings — the most practical way there is on foot, following the trail in that direction. What is the difference between Ursalto-ko koba II and Ursalto-ko koba I? They are two separate caves located close together in the same spot near Uztoki — Ursalto-ko koba II is one half of that pair. What can you see inside the cave? Inside are numerous broken stalactites, a sign of the natural karst processes that have shaped this small cave over the centuries.

Cueva de la Cocina

Dos Aguas

Cueva de la Cocina is an archaeological cave in the municipality of Dos Aguas, in the province of Valencia. It sits on the right bank of the Cinto Ventanas ravine, at roughly 400 meters of altitude, and ranks among the most important Epipaleolithic and Mesolithic sites on the Iberian Peninsula. Where is Cueva de la Cocina located? The cave lies within the Barranco de Cinto Ventanas gorge, close to another rock-art site, the Cinto Ventana shelter. The interior covers about 300 square meters, reaching a maximum width of 15 meters and a depth of 20 meters, while the entrance mouth is nearly 15 meters wide and 3 meters high. These generous proportions made the cave genuinely livable, which is likely why groups kept returning to it across thousands of years. Why does this site matter archaeologically? The site was identified in 1940, with the first excavations carried out between 1941 and 1943 and again in 1945; more recent fieldwork, including a campaign in 2016, continues to add new data. Cueva de la Cocina is best known for its rich assemblage of geometric microliths — small stone tools with distinctive geometric shapes. The stratigraphic sequence recovered here became a reference model for dating the Recent Mesolithic along the entire Mediterranean coast of Iberia; archaeologists now refer directly to the "Cocina facies" when comparing other sites to this one. Occupation layers stretch back to the 9th millennium BC and span the Epipaleolithic through the Mesolithic and into the advanced Neolithic, possibly reaching the early Chalcolithic. That represents an almost uninterrupted, multi-millennial use of the same shelter by successive groups of hunter-gatherers and, later, early farming communities. What will you see in and around the cave? The south wall of the cave preserves rock paintings attributed to Levantine Art, dated to approximately 10,000–6,500 years ago. The scientifically crucial detail is that the painted panel is covered by archaeological layers containing no pottery — one of the few direct pieces of evidence proving that Levantine paintings were made by Epipaleolithic hunter-gatherer groups rather than in a later period. The paintings were studied in the late 1980s by researchers Anna Alonso and Alexandre Grimal Navarro. Levantine Rock Art from the Valencia region, including the frieze at Cueva de la Cocina, was inscribed on the UNESCO World Heritage List in 1998. Nearby, the Cinto Ventana shelter holds additional paintings, and a walking route through the gorge links both sites for visitors interested in the full rock-art itinerary. How do you get to Cueva de la Cocina? Access is on foot, following the Barranco de Cinto Ventanas gorge near Dos Aguas; the marked trail connecting the cave, its paintings, and the Cinto Ventana shelter is popular with hikers and archaeology-focused travelers. Because the gorge has rocky, occasionally steep sections, sturdy footwear and enough daylight for the return leg are worth planning for. When is the best time to visit? Spring and autumn offer the most comfortable conditions, with moderate temperatures in the gorge and rock surfaces that aren't overheated by direct sun. Summer heat in this inland part of Valencia province can be intense, particularly around midday. Frequently asked questions Can visitors enter the cave interior? Access to the interior is sometimes restricted to protect the archaeological site — check current visiting rules with the Dos Aguas local authorities before planning a trip. What makes Cueva de la Cocina different from other rock-art caves in the region? Its defining feature is the pottery-free archaeological layers sealing the painted panel, which offer rare, direct proof of the Epipaleolithic origin of the Levantine art found here. Do you need a guide to visit the area? It isn't mandatory, but given the scientific value and sensitivity of the site, joining a guided visit with a local expert makes it much easier to understand the archaeological context. How long does the route to Cinto Ventana take? The trail linking the cave with the Cinto Ventana shelter is a multi-hour hike, depending on pace and how many stops you make at the painted panels along the way.

Cueva Grande o de los Corrales

Castro-Urdiales

Cueva Grande o de los Corrales is a cave holding Paleolithic art in Otañes, a parish of the municipality of Castro-Urdiales in Cantabria, northern Spain. Unremarkable from the outside, its interior preserves traces of human presence going back tens of thousands of years, placing it among the notable rock-art sites of the region. Where is it and how to get there? The cave lies in Los Corrales, a small settlement within Otañes — one of the parishes of Castro-Urdiales, in eastern Cantabria near the border with the Basque Country. Castro-Urdiales itself, best known for its Gothic church of Santa María and its harbour old town, sits several kilometres from the cave, and the most practical way to reach Otañes is by car, through a rural landscape of rolling hills typical of inland Cantabria. Before setting out, it is worth checking with the local tourist office, since access to the cave's interior is restricted and controlled to protect the images inside. What does the cave contain? Cueva Grande was discovered in 1970. Even the vestibule, the most accessible part of the cave, yielded a rich set of finds — animal bones, flint tools and pottery fragments — pointing to repeated use of the site by different groups over time. The vestibule splits into two galleries: the left one leads to a small, circular chamber, while the right one connects to a further section of the cave holding its most valuable images. It is there that two carefully executed engravings appear, depicting a deer and a goat, dated to the Magdalenian period, roughly between 16,500 and 14,000 years ago. Deeper inside, black paintings belonging to the so-called Schematic-Abstract cycle are also visible, along with fine engravings showing animals facing one another. This mix of techniques and motifs — from realistic engravings to abstract compositions — makes Cueva Grande a notable example of the long, layered use of caves by prehistoric communities along this stretch of the Cantabrian coast. Given its scientific value and the fragility of the images it preserves, the cave was listed as a Bien de Interés Cultural (Site of Cultural Interest) in 1998. This designation underlines the importance of the site for the study of Paleolithic art on the Cantabrian coast, alongside the region's more widely known cave-art locations. When to visit? Since Cueva Grande is primarily a restricted-access archaeological site, a visit is best planned in advance by contacting the local tourism office or the institutions responsible for protecting Cantabria's cultural heritage. For those interested in the surrounding area without entering the cave itself, spring and summer are the best times to explore Otañes and the nearby coastline, when the weather favours walking along the region's rural roads. Autumn and winter bring fewer visitors, though Cantabria's damp climate is worth keeping in mind year-round. Frequently asked questions What is Cueva Grande o de los Corrales? It is a cave in Otañes (Castro-Urdiales) containing Magdalenian-period engravings and paintings, including depictions of a deer and a goat dated to 16,500–14,000 years ago. When was the cave discovered? It was discovered in 1970, and excavation of its vestibule uncovered paleontological materials, flint tools and pottery fragments. Can visitors freely enter the cave? Access is restricted to protect the rock art inside — it is advisable to check visiting conditions with the local tourist information office beforehand. What protected status does the cave have? Since 1998, Cueva Grande has been listed as a Bien de Interés Cultural, confirming its importance to Cantabria's archaeological heritage.

Mendukilo cave

Larraun

Mendukilo Cave sits in the municipality of Larraun, in Spain's Navarre region, right next to the village of Astitz and just a few minutes from the town of Lekunberri, at the foot of the Aralar mountain range. It's one of the few caves in the area open to guided visits, known for the floating walkway that carries visitors through its underground chambers. How do you get to Mendukilo Cave? The cave lies in the Larraun valley, within the Sierra de Aralar, on land belonging to the council of Astitz. The nearest well-known reference point is Lekunberri, a few minutes away by car. The cave entrance serves as the meeting point for organized tours, and booking ahead is required since visits run only in guided groups. What will you see underground? The route covers roughly 540 metres and passes through three connected chambers, reaching more than 40 metres below the surface. Inside, visitors find rich mineral formations — stalactites, stalagmites, and flat, curtain-like draperies hanging from the ceiling. Dynamic lighting highlights the rock shapes and creates atmosphere without disturbing the cave's natural setting. The whole route runs along a raised floating walkway suspended above the cave floor, which keeps foot traffic from affecting the underground environment. What is the visit like? A visit lasts about 60 minutes and only happens in groups — a minimum of 5 and a maximum of 30 people — led by a local guide. Arrive at the entrance five minutes before your scheduled time. Bookings can be made by phone or through the cave's website. Footwear matters here: the walkway rules out high heels, so wear something flat and sturdy. For centuries the cave served local shepherds as a natural winter shelter for mountain livestock before it opened to the public on 22 July 2005. When should you visit, and what should you bring? Inside, the temperature holds steady at 8–9°C year-round regardless of the weather outside, so warm clothing is essential even in summer. Thanks to that constant temperature, the cave can be visited in any season, though it's worth checking the tour schedule in advance — group sizes are capped, and slots can fill up quickly on weekends and during holidays. Frequently asked questions Can I visit Mendukilo Cave on my own, without a guide? No. Visits run only in guided groups with a local guide, and you need to book in advance. How long is the visit and how long is the route? The visit takes about 60 minutes, covering a roughly 540-metre route through three chambers more than 40 metres underground. What's the temperature inside, and what should I wear? It stays cool year-round at 8–9°C, so bring warm clothing regardless of the season outside, along with flat, comfortable shoes. Since when has the cave been open to visitors? Mendukilo opened to the public on 22 July 2005, after centuries of use by locals as a natural shelter for mountain livestock.

Cueva del Cuco

Castro-Urdiales

Cueva del Cuco is a small cave in Castro-Urdiales, in the Urdiales district of Cantabria, holding a rare set of Palaeolithic rock engravings. Its entrance opens in a limestone cliff clearly visible from the town's bullring, making it an easy landmark to spot even for visitors who won't be going inside. Where is the cave located? Cueva del Cuco sits within the town of Castro-Urdiales, in its eastern Urdiales district. The mouth of the cave is set into a rock face right at street level, directly across from the local bullring — the simplest reference point for finding it. The surroundings are part of the town's built-up coastal stretch, so reaching the site doesn't involve any hiking. What is inside the cave? Past a small vestibule, a narrow, largely straight passage runs for around 100 metres. Roughly halfway along it opens a small chamber, which holds most of the discovered engravings. Two techniques were used: fine incised lines depicting animal heads and hindquarters, and wide, deeply cut grooves, including one large, complete deer figure. In total, the engravings identified include three deer, two ibex, two horses, and two animals that remain unidentified. Why does the cave matter historically? The engravings have been attributed to the Upper Solutrean period, giving them an estimated age of around 17,500 years. The cave was discovered in 1966, and its rock art was studied and published in 1968 by archaeologist Miguel Ángel García Guinea. Given its scientific value, the site was granted Bien de Interés Cultural status — Spain's cultural heritage protection category — in 1996. Can visitors go inside? The cave is currently closed to general public access. Visiting requires prior authorisation from Cantabria's regional culture and tourism authorities. In practice, this means there's no walk-in access — anyone wanting to see the interior needs to arrange the visit in advance through the relevant regional office. When is the best time to visit? Since entry depends on advance authorisation rather than opening hours, timing a visit is more about lead time with the regional administration than about weather or season. The cliff face and cave entrance itself, however, can be viewed from outside year-round — an easy stop while exploring the Urdiales district, for instance alongside a look at the nearby bullring. Frequently asked questions Can you enter Cueva del Cuco without booking ahead? No. The cave is closed to casual visits, and access has to be arranged in advance with Cantabria's regional culture and tourism authorities. What can be seen inside the cave? A narrow passage roughly 100 metres long leading to a small chamber with engravings of deer, ibex, horses, and a few unidentified animals, made using both fine incised lines and deeper carved grooves. How old are the cave's engravings? They date to the Upper Solutrean period, around 17,500 years old. Where exactly is the cave entrance? It opens in a limestone cliff in the Urdiales district of Castro-Urdiales, clearly visible from near the town's bullring.

Axlor cave

Dima

Axlor is a rock shelter and cave site in Dima, a small municipality in the Basque Country of northern Spain, recognized as one of the most important Middle Paleolithic sites on the entire Iberian Peninsula. The site sits on the slope of Mount Urrestei, in an area known as Kobalde-Indusi, right beside the natural rock arch called Jentilzubi, roughly fifteen meters above the ravine that drops toward the Indusi gorge. How was Axlor discovered? The shelter was found in 1932 by Basque ethnographer and prehistorian José Miguel de Barandiarán, while he was carrying out work at the nearby Baltzola cave. Systematic excavations at Axlor itself did not begin until 1967 and continued through 1974, spanning eight field seasons under his direction. Later research campaigns led by university teams have returned to the site in subsequent decades, uncovering further human and animal remains and refining the site's chronology. What has been found inside the cave? Axlor belongs to the Mousterian culture and is tied to Neanderthal occupation spanning roughly 100,000 to 50,000 years ago. The oldest deposits, labeled levels N through F, formed around 100,000 to 80,000 years ago, level D dates to about 70,000 years, and level B to roughly 50,000 years. Excavators recovered an extensive stone tool assemblage, including characteristic Mousterian sidescrapers made from flint transported from distant sources — evidence that Neanderthal groups moved across the landscape and maintained networks for exchanging raw materials. Researchers identified different knapping techniques through the sequence: a microLevallois approach in the lower levels and a distinctive Quina-type technique in level D. The site has also yielded more than a thousand bone tools, mostly retouchers made from long-bone shaft fragments, among the richest such collections in the region. One particularly striking find is a stone bearing an engraved X-shaped mark, dated to at least 45,000 years old — cited as evidence that Neanderthals were capable of symbolic, graphic behavior independent of the later arrival of modern humans in Europe. The cave has also produced human remains, including teeth and a skull parietal fragment, showing morphological features consistent with Neanderthals, while analysis of bird and carnivore bones from the Mousterian layers revealed cut marks left by human processing — documenting a diet that extended beyond typical large-game hunting. Why does Axlor matter to researchers? The site preserves one of the most complete Middle Paleolithic sequences in the North Atlantic region of the Iberian Peninsula. Studying its successive occupation layers has let scientists trace how Neanderthal groups organized their lives seasonally and adapted to a shifting Atlantic forest environment across tens of thousands of years, moving between warmer interglacial phases and colder glacial ones. How do you get to Axlor? Dima lies inland in Biscay, about 30 kilometers from Bilbao, tucked among the hills and valleys typical of the Basque interior. A car is the most practical way to reach the area — local roads lead toward Mount Urrestei, from where the shelter itself is reached on foot along a mountain trail. It's worth knowing that Axlor remains an active research site rather than a cave adapted for visitors, so access to the interior can be restricted; the main draw for travelers is the surrounding landscape and its deep historical context. What else is worth seeing nearby? The same municipality holds the Baltzola cave, where Barandiarán was excavating at the very moment he discovered Axlor, and which is known for its own Paleolithic cave art. Dima and its surrounding hills also make a good base for hiking through Biscay's green valleys, past pastures and beech woodland typical of the Basque countryside. When is the best time to visit? Spring and early autumn bring the most comfortable conditions, with moderate temperatures and dry, passable mountain trails. Summer can turn hot in direct sun, though the green valleys of Biscay temper the heat, while winter brings frequent rain and fog that can make the approach to the site more difficult. Frequently asked questions Can you tour Axlor cave like a typical show cave? No — it remains an active archaeological research site rather than a commercially developed cave, so access can be limited depending on ongoing or periodic fieldwork. Who lived in Axlor cave? Neanderthal groups associated with the Mousterian culture, occupying the site at different points between roughly 100,000 and 50,000 years ago. What is the most significant discovery from Axlor? Alongside its rich stone and bone tool collections, the stone engraved with an X-shaped mark stands out, seen as evidence of symbolic behavior among Neanderthals. How do you get to Dima? The easiest way is by car from Bilbao, about 30 kilometers away — the drive typically takes under an hour depending on traffic and time of day.

Cueva de los Ángeles

Villamalea

Cueva de los Ángeles is a small cave located in the municipality of Villamalea, in the province of Albacete, in the region of Castile-La Mancha. It sits roughly 7 km northeast of the town center, amid the typical Manchuela landscape of limestone hills and dry valleys. What will you find here? The cave itself is modest in size, with a depth of around 7 meters. Its name comes from the rock formations inside, which locals have long described as resembling angelic faces — a detail passed down through generations that gave the spot both its poetic name and its place in local folklore. Cueva de los Ángeles isn't a cave in the grand, cavernous sense — it's better described as a small rock shelter tied to a seasonal watercourse. Water appears here mainly after rainfall, trickling through small streams that eventually feed into the wider drainage system flowing toward the Cabriel River, one of the region's key rivers and a natural boundary between Castile-La Mancha and Valencia. What's the history behind it? The presence of water at this spot had real practical value for the local community. In the past, gardeners and small farmers built homes nearby specifically to make use of this scarce resource — valuable in the dry Mediterranean climate typical of the area — for irrigating their plots. Traces of this activity, including small plots and remnants of old agricultural structures, can still be spotted around the cave today, even though intensive farming here is now largely a thing of the past. How do you get there, and when's the best time to visit? The easiest way to reach Cueva de los Ángeles is by car from Villamalea, heading northeast from the town center — the drive takes only a few minutes. The site also lies along the PR-AB 40 hiking trail, part of the marked Senderos de Castilla-La Mancha network, making it a convenient stop for anyone planning a day combining nature and light hiking. Spring and autumn are the best seasons to visit, when temperatures in the Manchuela region are mild and the trails are most comfortable to walk. Summers here can get very hot, which makes longer hikes during midday less appealing. Bring sturdy walking shoes, water, and a camera — the surrounding hills offer nice viewpoints over the valley. Who is this destination for? Cueva de los Ángeles suits travelers looking for quiet, uncrowded natural spots rather than large, dramatic show caves. It appeals especially to hikers, landscape photographers, and anyone curious about the region's agricultural history and traditions. Given its small scale, a visit typically takes anywhere from a few dozen minutes to an hour, unless you plan to extend your trip with a longer walk along the nearby trails. Frequently asked questions How far is Cueva de los Ángeles from Villamalea's town center? The cave lies about 7 km northeast of town, roughly a ten-minute drive. Is there an entrance fee? No, it's a natural, open-air site that can be visited free of charge at any time. Do you need any special equipment to see it? No — comfortable walking shoes for uneven terrain are enough. The cave is small and easily accessible from ground level, with no caving gear required. Are there other attractions nearby? Yes, the site sits along the PR-AB 40 hiking trail, so a visit here can easily be combined with a longer walk through the surrounding Manchuela countryside.

Cueva de las Güixas

Villanúa

Cueva de las Güixas is a karst cave in Villanúa, sitting at the foot of the Collarada massif (2,886 m) in the Aragonese Pyrenees. Its name comes from the Aragonese word "güixa," meaning witch — local oral tradition from the 15th to the 19th century told of witches gathering deep inside the cave for sabbaths. The cave itself was carved out through the dissolution of limestone during the Quaternary period, in the Würm glaciation, roughly 25,000 to 30,000 years ago. How do you get there? Villanúa sits in the Aragón valley, right on the N-330 road heading toward the Somport pass and the French border, close to Jaca. The cave entrance is in the village itself, and every visit starts at the Centro de Interpretación Subterránea (Underground Interpretation Centre) in Villanúa. What will you see inside? The visit opens with a multimedia display at the interpretation centre, explaining how the cave formed and outlining the geology of the Collarada massif. After that introduction, the group heads out on a roughly 400-metre circular route through the cave itself — always with a guide, since independent access is strictly forbidden. The cave is protected as a Site of Community Interest within the Natura 2000 network, which is why entry rules are so strict. The full visit, interpretation centre included, runs about one hour and fifteen minutes. Inside, the temperature stays cool and constant year-round, so bring warm clothing and comfortable, non-slip shoes. The site is equipped for visitors with reduced mobility. When to visit and how to book? The cave can be visited all year, but only in guided groups and with a prior reservation. Standard visiting slots run at 10:30, 12:00, 16:00 and 17:30, Tuesday through Sunday — the site is closed Mondays, except on public holidays. During high season, meaning summer and Easter week, more time slots are added. It's best to book ahead through the Villanúa tourist office (email: cuevas@villanua.net, phone +34 974 37 84 65) or the town's official tourism website. How much does it cost? A standard adult ticket costs €8, children aged 5 to 12 pay €6, and kids under 5 get in free. Prices can change, so it's worth confirming the current rate when you book. Background and legend Beyond the witch legend, the cave's history runs much deeper — the earliest traces of human presence in the area date back to the Eneolithic period, around 3,000 BC. According to legend, in a section known as the "Dolina" or "Chimenea" (chimney), witches would hold their sabbaths, using a natural opening in the rock that let them see the sky, the moon and the stars — elements considered essential to their rituals. Frequently asked questions Can you visit the cave on your own, without a guide? No. Because it's a protected site within the Natura 2000 network, entry is only allowed in guided groups with a prior reservation. How long does the visit take? The full visit, including the interpretation centre, lasts about one hour and fifteen minutes, and the route inside the cave itself covers around 400 metres. Is the cave accessible for visitors with disabilities? Yes, the site has facilities in place to accommodate visitors with reduced mobility. Where does the name "Güixas" come from? It comes from the Aragonese word for witch, tied to a centuries-old local legend about witches holding sabbaths deep inside the cave — though some researchers also link the name to "guixa," a type of legume once grown in the surrounding fields.

Armintxe Cave

Lekeitio

Armintxe Cave lies beneath the old town of Lekeitio, a fishing port on the Basque coast, tucked into the southern slope of Arbiatx hill. It holds one of the most important collections of Paleolithic rock art found anywhere in Europe this century — yet it's a site no visitor can actually step inside. How was the cave found? On 1 May 2016, eight cavers from the Basque speleology club ADES Espeleologia Elkartea squeezed through a narrow, hard-to-reach passage and broke into a chamber nobody had entered before. What they found on its walls — dozens of engraved animal figures — was quickly described by specialists as one of the most spectacular rock art discoveries ever made on the Iberian Peninsula. What do the engravings show? Around 50 figures cover the rock surface. Bison, ibex and horses dominate the panel — one horse engraving stretches nearly a metre and a half. The biggest surprise for archaeologists was a pair of engraved lions, a motif never before recorded in Basque rock art. Semicircles and linear marks accompany the animals, carved with a technique closely matching engravings from the French Pyrenees, hinting at contact between communities on both sides of what is now the border. The images date to between 12,000 and 14,500 years ago, placing them in the late Magdalenian period. Can you actually visit the cave? No — Armintxe stays closed to visitors to protect the fragile engravings from the humidity, carbon dioxide and light that foot traffic would bring in. Instead, Lekeitio's tourist office runs a free continuous video showing the cave's interior, and the Bizkaia regional government has produced a 3D digital reconstruction of the engraved chamber, one of nine Basque Paleolithic sites scanned this way. When's the best time to see more of it? Plan around early August, when Lekeitio holds Arkeologia Eguna (Archaeology Day): guided talks, children's workshops and virtual projections that let you "enter" the cave without putting the artwork at risk. Outside that event, the tourist office keeps Armintxe material on display year-round, and Lekeitio itself — with its harbour, old quarter and beaches — makes an easy base for exploring this stretch of the Bay of Biscay coastline. Frequently asked questions Can I go inside Armintxe Cave? No. The cave is closed to the public to protect the engravings; only researchers working on the site are allowed inside. How can I see the engravings if I can't enter? Lekeitio's tourist information office shows a video of the cave's interior year-round, and once a year, during Arkeologia Eguna, it adds 3D projections and themed workshops. Who discovered the cave, and when? Eight cavers from the ADES Espeleologia Elkartea club found it on 1 May 2016 while exploring a difficult passage beneath the town centre. What exactly is engraved on the walls? About 50 animal figures — mostly bison, ibex and horses — plus a pair of rare lion engravings, all dated to roughly 12,000–14,500 years ago.

Legarrea

Bertizarana

Legarrea is a natural sinkhole cave (locally called a "sima") in the municipality of Bertizarana, in northern Navarre, about 2 km southwest of the town hall, near the village of Legasa. It sits at the meeting point of the rugged Malerreka countryside and a difficult chapter of 20th-century history, making it both a hiking destination and a site of remembrance. How do you get to Legarrea? The usual starting point is the village of Legasa, roughly an hour's drive from Pamplona, or easily reached from Elizondo in the nearby Baztán valley. Parking is available near the village sports court, where the marked trail begins. The path first climbs along a dirt track past wooden firewood sheds, then rises steadily toward the Mokorro pass at 474 metres. From there it branches off toward the cave, sitting at around 488 metres above sea level. The full loop covers about 8.6 km and takes roughly 3.5 hours at an unhurried pace with stops, with a total elevation gain of around 378 metres from the trailhead at 125 metres. The route is well signposted and straightforward to follow — a single path leads up to the top, and the same path brings you back down. What will you see there? Sima de Legarrea is a natural limestone sinkhole, open to the sky, typical of this part of Navarre's karst landscape. For decades, locals used it informally as a dumping ground, and layers of discarded waste are still visible inside. Beyond its geology, though, the site carries heavy historical weight: according to archaeological research carried out by the Sociedad de Ciencias Aranzadi, the sinkhole was used during the Spanish Civil War as a burial site for victims of wartime violence, reportedly including a pregnant woman and several of her children. In 2016, the Government of Navarre's Historical Memory office funded a project to clear the site and search for human remains. Because of this, visitors are encouraged to approach the cave with respect, treating it as a memorial rather than just another stop on the trail. Past the cave, the trail continues up to Mokorro peak (506 m), where hikers are rewarded with wide views over the hills of Malerreka and toward the nearby town of Santesteban. In the wider Bertizarana area you'll also find the Bertiz Aventura adventure park, and the region hosts an annual local festival, Malerrekako Eguna, celebrating traditions of this corner of Navarre. When is the best time to visit? Given the moderate elevation and mountain terrain, spring and autumn are the most comfortable seasons, offering mild temperatures and clear visibility. In winter, the upper stretches near the Mokorro pass can turn icy or slippery after rain or snow, so sturdy footwear is essential. In summer, an early morning start is recommended to avoid the midday heat on the more exposed sections near the summit. Frequently asked questions Can you reach the Legarrea cave on foot without a guide? Yes. The marked trail from Legasa is open to the public and does not require a guide, though carrying a map or GPS app is useful, especially in poor visibility. How long does the full route take? The complete loop from Legasa, via the Mokorro pass, the Legarrea cave, and Mokorro peak, takes about 3.5 hours at a relaxed pace with rest and photo stops. Is it safe to explore the cave itself? Sima de Legarrea is a natural sinkhole, not a developed tourist attraction — there is no lighting or safety infrastructure inside. Most visitors view it from the trail's edge rather than descending into it. Why is this site historically significant? Due to events from the Spanish Civil War, the cave is recognised as a memorial site linked to wartime repression. Archaeological studies and a Government of Navarre project have worked to document and honour this history.

Cova del Vell

Xeraco

Cova del Vell is a small karst cave in Xeraco, in the Valencian Community, Spain. It sits at roughly 40 metres above sea level, tucked into the rocky terrain of the Racó Ferragut area, in the Vinyoles district, close to the boundary with the town of Tavernes de la Valldigna. What makes this cave worth a visit? Cova del Vell combines two things that don't often go together: an easy, short walk and genuine archaeological weight. It's considered the oldest known trace of human presence in the area that is now Xeraco, dating back to the Lower Paleolithic. Excavations carried out in 1952 by Gurrea and Penalva uncovered pottery fragments, flint tools, bones and snail shells, confirming that the cave was used by people over a very long span of time. How do you get there? The route to Cova del Vell is short and doesn't require any climbing experience — it's a round trip of about 2 kilometres. The starting point is near the Safor service area (heading towards Alicante, right by the AP-7 motorway), or a pullout along the same road, surrounded by orange groves. A gap in a section of fencing lets walkers pass through on foot, and from there the route follows the white-and-orange markers of the Senda de la Taula trail before branching off onto a side path that leads directly to the cave. What else draws people here? The rock faces around Cova del Vell are also popular with climbers — several routes have been bolted in the area, including one known as "Diedro del Happy," roughly 80 metres long and rated 6a. That mix means the site attracts both casual visitors after a short walk with historical context and climbers looking for a route away from the crowds. The surrounding landscape adds to the appeal on its own: rugged, rocky slopes rising above a valley lined with the citrus groves typical of the Safor region — a stretch of terrain that captures the contrast found along this part of the Valencian coast, where steep hillsides drop down into fertile coastal lowlands. Who is this walk suited for? The short distance and lack of technical difficulty make it a good fit for families with children and anyone after an undemanding nature walk with something to learn along the way. Sturdy footwear is worth packing regardless — the ground is rocky and uneven in places, even if the overall distance is modest. Cova del Vell makes a solid option for anyone based near Gandia or Tavernes de la Valldigna who wants an alternative to the Costa Blanca beaches: a short outing that combines nature, history and a bit of physical activity. Frequently Asked Questions How long is the walk to Cova del Vell? It's a round trip of around 2 kilometres, starting from a pullout near the AP-7 motorway and ending at the cave. Does the cave have historical significance? Yes — Cova del Vell has produced evidence of human presence dating to the Lower Paleolithic, including pottery fragments, flint tools and bones, making it the oldest known archaeological site in the Xeraco area. Where can I park before starting the walk? The most convenient starting point is near the Safor service area on the AP-7 motorway (Alicante direction), or a nearby pullout surrounded by orange groves. Can you go climbing near the cave? Yes, the rock faces around Cova del Vell are used by climbers, including a route called "Diedro del Happy," about 80 metres long.

Sima de Manuel Mozo

Villanueva de Alcorón

Sima de Manuel Mozo is a vertical karst cave (sima) near Villanueva de Alcorón, in the province of Guadalajara, inside the Alto Tajo Natural Park in Castilla-La Mancha, Spain. Cavers regard it as the most frequently visited sima in the whole province, though this is a technical caving destination rather than a casual sightseeing stop. What does the cave look like inside? The entrance drops through a short six-metre pitch (P6) before opening onto the site's main feature: a roughly 90-metre shaft nicknamed "Tubo de Aspirinas" (Aspirin Tube) by local cavers. It's a strikingly cylindrical, almost uniform vertical tube that runs the descent in one continuous drop. Around 60 metres down, a pendulum move off the rope gives access to a side branch leading to a further shaft of about 40 metres. Together the two shafts form one of the more dramatic vertical systems in the Alto Tajo karst region. Who is this cave suited for? This is a technically demanding sima. Descending it requires full single-rope-technique caving gear — harness, descenders, ascenders, ropes of adequate length — and prior experience with vertical caving. It is not a site for unprepared visitors; the people who come here are almost exclusively organised caving clubs and speleology groups. Serious accidents have occurred at the site in the past, so attempting the descent without proper training and equipment carries real risk. How do you get to the entrance? Access runs along the CM-2101 road linking Villanueva de Alcorón and Peñalén. A dirt track branches off near the Refugio de la Zapatilla recreation area and the nearby Sima de Alcorón, leading toward the cave mouth. The entrance itself sits in typical Alto Tajo karst terrain, surrounded by rocky, partly wooded landscape. What else is worth seeing nearby? The immediate surroundings belong to the Alto Tajo Natural Park, one of central Spain's most distinctive karst landscapes, shaped by deep river gorges cut by the Tagus and its tributaries. The nearby Sima de Alcorón and the Refugio de la Zapatilla rest area make this corner of the Villanueva de Alcorón municipality a natural gathering point for caving groups exploring the region. Frequently Asked Questions Can you visit Sima de Manuel Mozo without caving experience? No. It's a technically demanding vertical cave requiring full rope gear and single-rope-technique skills. Descending without proper training is dangerous. How deep is the cave? Its main feature is a shaft roughly 90 metres deep, the "Tubo de Aspirinas," preceded by a short six-metre pitch, plus a side branch shaft of about 40 metres. How do you reach the cave entrance? Take the CM-2101 road between Villanueva de Alcorón and Peñalén, then follow the dirt track that branches off near Refugio de la Zapatilla and Sima de Alcorón. What else can you explore in the area? The Alto Tajo Natural Park offers extensive karst gorges and other caves and shafts, including the neighbouring Sima de Alcorón — the region is a popular destination for caving clubs from across Spain.

Lezaundi

Urbasa mendia

Lezaundi is a cave (Cueva de Lezaundi) in the Urbasa mountain range, Navarre, at an elevation of roughly 1,099 meters — the largest cave in Urbasa Natural Park. It lies on the communal land of the Urbasa range, close to the famous Portupekoleze rock arch. What will you see? The cave's huge mouth measures 102 meters long, 72 meters wide, and 35 meters high — it most likely formed from the collapse of a large dolina (sinkhole), leaving a semicircular stone ledge surrounding a circular depression. Several smaller openings at the base lead into a network of shafts, halls, and galleries totaling 440 meters in length and reaching around 70 meters in depth. The cave also holds archaeological significance — Bronze Age ceramics were discovered during surface exploration. The Urbasa massif itself is one of the few places in Navarre where traces of the Lower Paleolithic have been found, marking the oldest known period of human presence in the region. How to get there? Popular hiking routes to Lezaundi cave typically run 12–16 km and start from the parking area at Venta de Lizarraga. The trail crosses the scenic Urbasa landscape — beech forests and expansive pastures — and often combines Lezaundi with the nearby Portupekoleze arch into one outing. When to visit? Spring and autumn are the best seasons for hiking — moderate temperatures and dry paths make longer routes easier. In summer, it's worth setting out early morning, while in winter you should expect possible ice on the terrain above 1,000 meters elevation. Frequently Asked Questions Can you go inside Lezaundi cave? The huge entrance chamber is accessible to visitors, but the deeper sections (shafts and galleries) require proper caving preparation and equipment. What archaeological finds were made at Lezaundi? Surface exploration uncovered Bronze Age ceramics, and the wider Urbasa massif has yielded Lower Paleolithic traces — the oldest evidence of human presence in Navarre. How did this cave form? Most likely through the collapse of a large karst dolina, which explains its distinctive semicircular entrance shape. Is it worth combining the visit with the Portupekoleze arch? Yes, both sites are close together and form one of the best-known hiking routes in the Sierra de Urbasa.

Portupekoleze

Urbasa mendia

Portupekoleze is a spectacular rock arch in the Urbasa mountain range, Navarre, part of the Urbasa-Andía Natural Park. The formation emerged from a karst landscape — millions of years ago the sea covered the area, and limestone formed from the remains of marine organisms was gradually shaped by water into a system of sinkholes, caves, and curious rock formations, including this arch. What will you see? Portupekoleze rises from a deep sinkhole (dolina) — a huge natural rock bridge greets visitors with a structure of vaults, spires, and buttresses that change shape depending on the viewing angle. It's one of Navarre's most photogenic spots, increasingly popular on social media. Nearby lies the Lezaundi cave — the largest cave in Urbasa Natural Park — well worth combining into a single outing. How to get there? The hiking route to the Portupekoleze arch usually starts from the parking area at Venta de Lizarraga and winds through the Urbasa-Andía landscape — beech forests and expansive pastures. Popular routes combining Portupekoleze with the Lezaundi cave typically run 12 to 16 km. When to visit? The best conditions are in spring and autumn, when temperatures suit longer hikes and paths stay dry. In summer, the beech forests provide shade, but it's worth setting out early morning; in winter the terrain can turn icy and requires extra caution. Frequently Asked Questions Can you drive directly to the Portupekoleze arch? Not directly — you need to park at Venta de Lizarraga and continue on foot along the marked trail. Is it worth combining the visit with Lezaundi cave? Definitely — both sites lie close together and form one of the most popular hiking routes in the Sierra de Urbasa. How difficult is the trail? The route is moderately demanding, accessible to hikers of average fitness, though its length (12-16 km) calls for proper preparation. Where does this rock formation come from? It's the result of limestone erosion by water in a typical karst landscape — a process spanning millions of years, characteristic of the whole Urbasa-Andía range.

Jentiletxetako haitzuloak

Mutriku

Jentiletxetako haitzuloak is a cave complex located in the Olatz neighborhood of the Mutriku municipality, in the province of Gipuzkoa, Basque Country. The name references jentilak — mythical giants from Basque folklore, to whom local tradition attributes ancient stone constructions and natural rock formations across the region. The caves lie within the Basque Coast Geopark (Euskal Kostaldeko Geoparkea), which spans the coastal areas of Deba, Zumaia, and Mutriku. What will you see? Significant archaeological remains have been discovered in the Jentiletxeta caves, confirming that the site was used by humans in the past. The surrounding landscape is characteristic rocky terrain typical of the geopark — flysch layers and limestone formations shaped by marine erosion and surface water action over millions of years. The name itself, along with local jentilak legends, adds a cultural layer to the site, blending geology with Basque mythology. How to get there? The caves sit along the PR-GI 47 hiking trail, known as Olatzeko geo-ibilbidea (the Olatz geo-route), which winds through the Olatz neighborhood of Mutriku. The route forms part of the geopark's marked trail network and is accessible to hikers of average fitness. When to visit? Spring and early autumn are the best times for the hike, when temperatures along the Basque coast are mild and trails remain dry and safe. It's worth avoiding days with heavy rainfall, which is common in this region during winter. Frequently Asked Questions What are the jentilak the caves are named after? They're figures from Basque folklore — mythical giants traditionally credited with building megaliths and other mysterious structures found across the landscape. Is the route to the caves difficult? The PR-GI 47 trail is a marked, moderate hiking route accessible to most visitors without special preparation. What else does the Basque Coast Geopark offer? The region features spectacular geological formations (such as the Zumaia flysch), coastal trails, and numerous viewpoints over the Bay of Biscay. Have traces of past settlement been found in the caves? Yes, archaeological research at Jentiletxeta has confirmed significant remains indicating the site's use in earlier times.

Cau del Duc d'Ullà

Ullà

Cau del Duc d'Ullà is a small karst cave in the municipality of Ullà, in the Baix Empordà region, on the southern slope of the Montgrí massif in Catalonia, Spain. Archaeologically significant for its Lower and Middle Paleolithic finds, it also makes for an easy, short hiking destination for visitors exploring the area around Torroella de Montgrí. Where is it? The cave sits at around 241 metres above sea level, on a hillside overlooking the village of Ullà. It should not be confused with the larger and better-known Cau del Duc del Montgrí, located elsewhere in the same massif — the name "cau del duc" (the duke's den) is used for more than one rock formation of similar shape in this part of Catalonia. How to get there? The most convenient starting point is Torroella de Montgrí, from where a marked footpath leads toward Ullà and up the lower slopes of Montgrí. The walk is gentle, with no technical difficulty, and pairs well with a visit to Ullà itself, a village known for its well-preserved medieval layout. Ullà is reachable by car, and the final stretch to the cave follows an unmarked but clearly visible track on foot. What will you see? The entrance faces southwest and forms an almost perfectly circular opening about 1.4 metres wide. It widens inward into a chamber measuring roughly 3.4 by 2 metres. The floor slopes downward, forming a basin-like depression where, over thousands of years, sediment layers accumulated and became fixed within limestone breccia — the very feature that turned the site into a valuable archaeological deposit. Excavations dating back to the 1920s — first documented in 1922 by Matías Pallarès and Lluís Pericot — uncovered numerous animal bones and stone tools indicating human presence during the Lower and Middle Paleolithic. These finds are now on display at the Museu Mediterrani in Torroella de Montgrí, allowing visitors to pair the site visit with historical context. When to visit? Thanks to its southern exposure and modest elevation, the site can be visited year-round. Spring and autumn offer the most comfortable temperatures for the approach, while summer visitors should aim for early morning to avoid the Costa Brava heat. In winter, the trail tends to be quiet, making for an unhurried visit. Frequently asked questions Can you see anything inside the cave without a guide? Yes, the entrance is easily accessible and the chamber can be viewed without specialist equipment, though a torch is useful since the interior has no lighting. Is the cave suitable for children? The approach is straightforward, but the final stretch crosses uneven hillside terrain, so caution is advised with younger children. Where can I see the archaeological finds from this site? Artifacts from the excavations are held at the Museu Mediterrani in Torroella de Montgrí, a few kilometres away. Is this the same place as Cau del Duc del Montgrí? No — despite the similar name, it is a different, smaller cave. Cau del Duc del Montgrí is larger and lies in another part of the massif.

Forat de Bulí

Coll de Nargó

Forat de Bulí is a striking karst gorge system carved by the Rialb river, straddling the municipalities of Coll de Nargó and Sant Martí de Rialb in the province of Lleida, Catalonia. What exactly is this place? Forat de Bulí formed in the westernmost limestone of the Aubenç mountain range, at a spot known as Gavarra. Rather than a single canyon, it's a system of four extremely narrow and deep gorges, where the height difference between the walls exceeds 200 metres at some points. The rock faces close in so tightly that in places the sky is barely visible overhead, and the sound of the river bounces off stone on both sides. The most remarkable feature of the system is its hydrology. The waters of the Rialb river vanish underground at a location called Les Cots and travel invisibly beneath the limestone for a stretch, only reappearing inside the Bulí gorge itself. This resurgence is a textbook Vauclusian spring — a karst phenomenon in which groundwater bursts back to the surface under pressure after an underground journey. At the far end of the system, the river flows into a natural tunnel carved through solid rock, roughly 100 metres long, before emerging again into open air. That combination — deep narrow gorges, a river that disappears and reappears, and a long rock tunnel — is why Forat de Bulí is considered one of the most unusual karst formations anywhere in Catalonia. How do you get there? The site sits near Coll de Nargó, a small village in the Lleida Pyrenees well known to visitors of the nearby Rialb reservoir and the Segre river valley. Access runs along local roads toward the settlement of Gavarra and the Rialb river valley, and the gorges themselves are best explored on foot, following the riverbed or its banks depending on the current water level. What will you see there? The main draw is the rock formation itself — narrow, towering limestone walls that in places almost meet above your head. Look out for the point where the river disappears underground, and the spot in the Bulí gorge where it resurfaces — a rare chance to watch a karst spring phenomenon play out in real time. The rock tunnel at the end of the route is a natural gateway shaped by water over thousands of years. When is the best time to visit? Water levels in the Rialb river shift seasonally, and this directly affects how accessible and how demanding the route through the gorges is. The site is popular among people doing water hiking and light canyoning, for whom the water level is a key factor in both safety and difficulty. Late spring and summer, when flow is more stable and the water is warmer, are generally the best times to go. Frequently asked questions Is Forat de Bulí a cave? Not exactly — it's a system of narrow karst gorges with a stretch where the river runs underground, plus a rock tunnel at the end, rather than a classic cave you explore with a headlamp. Do you need experience to visit? The terrain — narrow gorges, variable water levels, and sections that require wading through the riverbed — means many visitors treat it as a water-hiking or light-canyoning route rather than a casual walk. Where exactly is Forat de Bulí located? On the border between the municipalities of Coll de Nargó and Sant Martí de Rialb, in the province of Lleida, within the Aubenç limestone range near the settlement of Gavarra. What makes this place special? A rare combination in one location: deep, narrow rock gorges, a river that vanishes underground, a Vauclusian spring resurgence, and a long natural rock tunnel — a combination considered unique within Catalonia.

Las Caldas cave

Oviedo

Las Caldas cave sits in a partial nature reserve within the Nalón Valley, in the municipality of Oviedo, close to the villages of La Piñera and Las Caldas. The protected area covers 45 hectares and combines scenic river-valley landscape with a long history of human presence in this part of Asturias. Where exactly is it? The cave lies in the Nalón Valley, a short drive from the centre of Oviedo, the capital of Asturias. It borders the village of Las Caldas, long known for its warm springs, and the neighbouring La Piñera. Its coordinates are roughly 43.329 N, -5.927 W. The surrounding terrain is typical of the Nalón Valley: forested slopes, limestone outcrops, and the river itself, which has carved out the karst systems found here over thousands of years. What makes this place worth knowing about? The name Las Caldas refers to the hot springs that have been used in the nearby village for centuries — one of the reasons this stretch of the Nalón Valley has attracted settlement and visitors for a very long time. The area around the cave was given partial nature reserve status precisely because of this combination: a valuable karst environment, distinctive river-valley flora and fauna, and traces of a long human presence in the region. The cave is listed as a cultural property within the municipality of Oviedo, underlining its significance beyond pure geology. How do you get there? The most convenient starting point is Oviedo — from the city centre it's a drive of around fifteen to twenty minutes along roads that follow the Nalón Valley to reach the Las Caldas area. Travellers without a car can take a taxi or local transport toward the village of Las Caldas, from where only a short walk remains to reach the reserve. The Nalón Valley itself is a popular destination for hiking and cycling among Oviedo residents, so the approach can be part of the experience. What will you see on site? The Nalón Valley landscape around Las Caldas combines greenery, limestone rock and water — the river accompanies the route for much of the way. The protected area lets visitors appreciate the terrain typical of Asturian karst country: ravines, rock outcrops and cave entrances shaped by water over time. It's a contemplative rather than spectacular destination, best suited to those interested in geology, river landscapes and a quiet setting close to a major city. When should you visit? Spring and early autumn are the best seasons for walking the Nalón Valley — moderate temperatures and lower humidity make outdoor exploration easier. Summer tends to be warmer and more humid, typical of the Asturian climate, while winter brings heavier rainfall, which can make access to the steeper parts of the reserve more difficult. Frequently asked questions Can you go inside the cave itself? The cave interior is protected due to the sensitivity of the karst environment, so access can be restricted — it's worth checking locally before your visit, especially if you're hoping to go inside rather than just explore the surrounding area. How long does it take to get there from Oviedo? From central Oviedo, reaching the Las Caldas area usually takes fifteen to twenty-five minutes, depending on the exact destination within the Nalón Valley and your mode of transport. Is it worth combining with other nearby attractions? Yes — the Nalón Valley and the area around Oviedo include several similar karst and natural sites within a short distance, making it easy to plan a longer walk or a route combining several stops. Is this a good destination for families with children? The valley walk itself is accessible to most visitors, but it's worth checking trail conditions and any access restrictions to the cave in advance.

Cueva Negra del Estrecho del Río Quípar

Caravaca de la Cruz

Cueva Negra del Estrecho del Río Quípar is one of Europe's oldest archaeological sites, tucked into a rocky gorge of the Quípar River in the municipality of Caravaca de la Cruz, in Spain's Murcia region. Rather than a show cave with lit passageways, this is an open rock-shelter carved into a limestone cliff, and it has drawn palaeoanthropologists from around the world for decades. What is Cueva Negra known for? The site sits on the right bank of the Quípar River, roughly 40 metres above the riverbed, at an altitude of just under 740 metres. Dating places human activity here between 780,000 and 990,000 years ago, making it one of the oldest documented traces of human presence anywhere in Europe. Excavations have yielded six teeth and bone fragments belonging to a population close to Homo heidelbergensis, a direct ancestor of the Neanderthals. The most striking discovery has been evidence of fire, considered among the earliest confirmed proof of fire use by humans on the European continent. Alongside it, archaeologists found stone tools, including an Acheulian hand-axe regarded as the oldest of its kind found in Europe, plus small flakes of chert, limestone and quartzite worked using bipolar reduction and centripetal flaking techniques. How do you get to Cueva Negra? The starting point is La Encarnación, a small village on the outskirts of Caravaca de la Cruz. The access road to the site leads to a spot known as La Ermitica, from where a path continues toward the gorge. There is a parking area near the Encarnación hill, and from there the rest of the route is covered on foot without much difficulty. The surrounding area also offers well-marked hiking trails running along the Quípar River. What else is worth seeing nearby? The route along the gorge also leads to the ruins of Castillo del Rey Moro, a medieval fortress overlooking the valley, and to the Ermita de la Encarnación, a small hermitage built into the rocky landscape. That makes it easy to turn a visit to Cueva Negra into a short, few-hour walk through one of the most scenic corners of the Murcia region, framed by the gorge's steep walls and the riverbed below. When to visit and how to explore the site? Independent visits are possible year-round, but the most rewarding time is during the open days organised by the Caravaca de la Cruz town council, when the researchers leading the excavations personally guide visitors, explain how the dig progresses, and present the most significant finds. It's the only chance to see the site through the eyes of the people uncovering and studying it, so it's worth checking the current schedule of these events before planning a trip, as they run seasonally. Frequently asked questions Can you visit Cueva Negra on your own? Yes, the gorge and the area around the cave can be reached without much difficulty, using the parking area near the Encarnación hill and the marked paths leading from La Ermitica. Why is this site so scientifically important? Because it holds some of the earliest evidence of human presence in Europe: bone remains hundreds of thousands of years old, traces of early fire use, and the oldest Acheulian hand-axe found on the continent. Is it possible to visit with a guide? Yes, during the periodically organised open days the researchers running the excavations personally guide visitors and explain their archaeological methods. What else can you see nearby? The same valley holds the ruins of Castillo del Rey Moro and the Ermita de la Encarnación, and the whole area is crossed by hiking trails along the Quípar River, ideal for a longer walk.

Cova Fosca

el Vilosell

Cova Fosca is a small but scenic cave in the municipality of el Vilosell, in the heart of the Catalan comarca of les Garrigues (province of Lleida). Tucked into the valley of the Riu de Set, it is also known as Cova d'en Cintet, named after a former landowner who once tended the site. The cave's main name, "fosca" (dark), reflects the fact that very little sunlight ever reaches its interior, leaving it in near-permanent shade even at midday. What will you see there? The cave covers roughly 400 square metres, forming a flat, natural rock platform sheltered from direct sun. According to local tradition, the site's former owner — the aforementioned Cintet — put considerable effort into shaping the spot and placed a small statue of the Virgin Mary at the entrance, which became known locally as "Mare de Déu de la Cova" (Our Lady of the Cave). Right beside it sits Font de la Teula, a spring that feeds the Riu de Set flowing through the area, making the cave a natural stopping point along the local hiking routes. The Riu de Set itself rises at around 950 metres of altitude, near the hermitage of Sant Miquel de la Tosca, and flows through several municipalities of les Garrigues, including la Pobla de Cérvoles, el Vilosell and Cervià de les Garrigues. Its course also forms the natural boundary between el Vilosell and the neighbouring la Pobla de Cérvoles. How to get there? Cova Fosca is reached via an easy, largely flat trail running along the Riu de Set valley — one of the area's most popular walking routes, known as the "Ruta del riu Set" (the stretch between el Vilosell and el Cogul, or in the opposite direction). The cave lies about a kilometre off the main path, at a fork where the route splits into three — simply follow the branch toward the cave. Alternatively, the walk can start from L'Albi, setting off from behind the hermitage of Sants Cosme i Damià and following the riverbed. Good news for less experienced hikers: it's possible to drive almost all the way to the cave and the nearby Font de la Teula spring, cutting the walking portion down to very little. When to visit? Thanks to its shade and cool interior, along with a sheltered stretch of valley leading up to it, Cova Fosca makes a pleasant destination in spring, autumn, and even summer, when temperatures in les Garrigues can climb quite high. The route stays open in winter too, though it's worth checking trail conditions after rain, as parts of the path can become trickier underfoot. Morning is the best time to go, when the light in the Riu de Set valley highlights the contrast between the sun-drenched riverbed and the cave's shadowy platform. Frequently asked questions Is Cova Fosca the same place as Cova d'en Cintet? Yes, they're two names for the same spot. "Cova Fosca" refers to the cave's dark character, while "Cova d'en Cintet" comes from the name of a former local landowner. Is the trail suitable for families with children? Yes, the stretch along the Riu de Set is mostly flat and easy, and it's possible to drive almost up to the cave and the Font de la Teula spring. What else is worth seeing besides the cave itself? Nearby you'll find the Font de la Teula spring and the scenic Riu de Set valley, and the route can be extended toward the hermitage of Sant Miquel de la Tosca or the village of L'Albi. Does the cave have any religious significance? Yes, a small statue of the Virgin Mary — known as "Mare de Déu de la Cova" — stands at the entrance, placed there on the initiative of a former landowner.

Nature in Spain