Nature — Spain — NextOnTrip

Laguna San Pedro

Ossa de Montiel

Laguna San Pedro is one of the lakes in the Lagunas de Ruidera chain, a scenic string of interconnected lagoons near the village of Ossa de Montiel, in the province of Albacete, Castilla-La Mancha. It sits within the Lagunas de Ruidera Natural Park, a protected area known for its distinctive karst landscape and rich wildlife. Where exactly is Laguna San Pedro? The lake belongs to a system of around fifteen interlinked lagoons stretching along a river valley on the border between the provinces of Albacete and Ciudad Real. The chain formed over thousands of years thanks to natural travertine dams that built up in the riverbed, creating a cascading sequence of pools separated by small waterfalls and rocky ledges. Ossa de Montiel, the nearest sizeable town, serves as the main gateway to the park and the natural starting point for exploring the area. How do you get there? Lagunas de Ruidera Natural Park lies in the heart of Castilla-La Mancha, a region best known for the landscapes described in Cervantes' "Don Quixote." Ossa de Montiel is the obvious base for a visit — local roads and trails lead from the village into the park, running past the individual lagoons of the chain, Laguna San Pedro included. A car is the most practical option, since the park covers a fairly wide area and the lakes are spread several kilometers apart from one another. What will you see at Laguna San Pedro? The defining feature of the whole Lagunas de Ruidera system is the striking turquoise-green color of the water, caused by dissolved calcium carbonate and the specific aquatic vegetation that thrives in it. The shores are lined with reeds, rushes, and trees typical of a Mediterranean wetland, and the surrounding countryside supports numerous species of waterbirds, making the area a rewarding spot for birdwatching. The landscape mixes rocky outcrops and small cliffs overlooking the water with gentler, green valley sections. What can you do in the area? The park is a popular destination for hikers and cyclists, with trails connecting the different lagoons so visitors can explore the chain in stages rather than all at once. Swimming and water sports such as kayaking or paddleboarding are possible at several points along the lakes, though rules can vary from one lagoon to another and are worth checking locally before you go. The region also draws landscape photographers, thanks to the contrast between the blue-green water and the dry, stony hills typical of La Mancha. When is the best time to visit? Spring and early summer are the best times to come, when water levels are higher, vegetation is lush, and temperatures are comfortable for both hiking and swimming. Late summer tends to be hot and dry, as is typical for central Spain, so bringing water and sun protection is essential. Autumn and winter bring quieter trails and fewer crowds, though some water-based activities may not be available during the colder months. Frequently Asked Questions Can you swim in Laguna San Pedro? Several lagoons in the chain allow swimming in designated spots, but rules can vary by season and by lagoon, so it's worth confirming locally before your visit. How far is Laguna San Pedro from Ossa de Montiel? The lake lies within Lagunas de Ruidera Natural Park, for which Ossa de Montiel is the closest sizeable town and the main access point. Are there hiking trails nearby? Yes, the park has a network of walking and cycling trails linking the lagoons, allowing visitors to explore the chain step by step. What should you bring for a visit? Comfortable footwear, water, sun protection, and swimwear if you plan to take a dip in one of the lagoons — essentials for the region's dry, sunny climate.

Obago Lake

Naut Aran

Obago Lake is a glacial mountain lake in the municipality of Naut Aran, in the upper Val d'Aran valley, deep in the Catalan Pyrenees. It's one of many tarns left behind by glacial activity that shaped this part of the range, where rocky cirques, sharp ridgelines, and high alpine meadows dominate the scenery. Where is Obago Lake? The lake sits within Naut Aran, the largest and highest municipality in Val d'Aran, covering a stretch of mountain villages and terrain right up against the French border. Naut Aran is known for wide alpine landscapes, rocky peaks, and a scattering of glacial lakes at different altitudes — Obago Lake is one of them, fitting the pattern typical of this stretch of the Pyrenees. How do you get there? Like most lakes of this kind in Val d'Aran, Obago Lake is reached on foot. Trailheads typically start from villages within the Naut Aran municipality, with paths leading up into the range. Given the high-altitude setting and the Pyrenees' changeable weather, it's worth checking current trail conditions and getting a map from a local tourist office or park information point before heading out — the exact markings and length of the approach depend on the route chosen. What will you see there? A glacial lake of this type is usually a small, still body of clear, cold water, framed by rock walls and scree typical of high mountain cirques. In the Pyrenees, lakes like this often shift between shades of turquoise and grey depending on the time of day and the angle of light, with sparse alpine grasses and dwarf pine clinging to the shores. Obago Lake fits that same mold — a quiet, stripped-back alpine setting with views over the surrounding ridges and valleys of Naut Aran. For hikers looking for a break from busier trails, or for anyone chasing mountain photography, it makes a natural stop on a longer trek through this part of the Pyrenees. When should you visit? Summer — from June to September — is the best window for visiting high-altitude lakes in Val d'Aran, once most of the snow has cleared and trails become passable. Early summer can still bring patches of snow around the lake, which adds to the scenery but calls for proper footwear and caution. In autumn and winter, the higher parts of the Pyrenees can be hard to reach due to snow and ice, so a visit in those months requires more mountain experience and preparation. Frequently Asked Questions Is it hard to reach Obago Lake? The lake lies in the high-altitude part of Naut Aran, so getting there takes decent fitness and preparation for mountain terrain. Plan your route and check trail conditions before setting out. What's the best time of year to visit? Summer, roughly June through September, when trails are clear of snow and most accessible. Can you swim in the lake? High-altitude glacial lakes in the Pyrenees tend to stay very cold year-round, so swimming isn't typically what draws visitors here. Are there other things worth seeing nearby? Naut Aran is one of the most mountainous parts of Val d'Aran, with plenty of trails and other glacial lakes in the area, so it's worth pairing a visit to Obago Lake with a longer route through the surrounding peaks and valleys.

Estanh Mòrt

Naut Aran

Estanh Mòrt is a small glacial lake tucked into the high mountains of Naut Aran, the municipality that occupies the far end of Val d'Aran in the Catalan Pyrenees. Its waters rest in a rock basin carved out by ancient ice, surrounded by the bare granite ridges, dwarf pine and alpine meadows typical of this altitude, which only turn green once the snow has melted. Where exactly is Estanh Mòrt? The lake sits within the Circ de Colomèrs, one of the best-known glacial cirques in Naut Aran. This is an area with an unusually high concentration of lakes — the municipality of Naut Aran alone counts more than 200 bodies of water of glacial origin, and the Colomèrs and Rius-Restanca areas are considered the most striking among them. Estanh Mòrt lies along the trail linking several of these lakes, between the old Colomèrs refuge and the higher-lying Estanh des Garguilhs de Jos. How do you get there? The starting point is the Banhs de Tredòs car park, reached by a paved forest road from the village of Salardú. From there, the old Colomèrs refuge — the real starting point of the circular lake trail — can be reached on foot or by a seasonal 4x4 shuttle service. Leaving the refuge, the path climbs through a narrow stretch and arrives at the shore of Estanh Mòrt, which the trail skirts on its left side. What will you see along the way? Past the lake, the trail climbs a small gully marked with yellow waymarks, continuing on to Estanh des Garguilhs de Jos, another link in the Circ de Colomèrs chain of lakes. The whole area belongs to the classic hiking route through seven lakes, a route popular with visitors to Naut Aran precisely because of how many glacial lakes are packed into one stretch of mountain. The scenery shifts gradually, from the rocky ledges right by the lake to more open, higher-lying terraces holding further sheets of water. When should you go, and how should you prepare? The route is rated as a moderate mountain hike — it involves no technical climbing, but does include real elevation gain, so sturdy trekking boots are essential. Even in summer, it's worth packing a warm layer, since weather at this altitude can shift quickly and wind around the lakes can be biting regardless of season. Summer and early autumn are the best times to hike here, when the trail is free of snow and the 4x4 shuttle to the Colomèrs refuge runs regularly. Frequently Asked Questions Is it hard to reach Estanh Mòrt? Driving only gets you as far as the Banhs de Tredòs car park. From there you continue on foot, or take the seasonal 4x4 shuttle up to the Colomèrs refuge, after which only a short, narrow stretch of walking trail separates you from the lake. Is the trail suitable for beginners? It's rated a moderate hike — no climbing or exposed sections, but with noticeable elevation gain. Anyone with average fitness should manage it comfortably, provided they have proper footwear. Are there other lakes to see nearby? Yes. Estanh Mòrt is one stop along the trail connecting several lakes in the Circ de Colomèrs, including the higher Estanh des Garguilhs de Jos. It forms part of the wider multi-lake hiking route through this part of Naut Aran. What's the best season to hike here? Summer and early autumn, when the trail is clear of snow and the shuttle service to the refuge is running normally. Even then, pack a warm jacket — weather in the high Pyrenees can change fast.

Laguna de Tirez

Villacañas

Laguna de Tirez is a salt endorheic lake south of Villacañas, in the province of Toledo, Castilla-La Mancha. It belongs to the Guadiana river basin, specifically the Riánsares sub-basin, though the lagoon itself has no direct link to any watercourse — it fills solely from rainfall and shallow sub-surface runoff. It covers roughly 62 hectares and sits in a flat, shallow basin typical of the steppe lagoons scattered across the La Mancha plain. What will you see? The lagoon's biggest draw is how dramatically it changes through the year. In summer, water evaporates quickly and white salt crusts form across the surface and shoreline, turning the basin into a cracked, sun-baked salt flat. After rain, the cycle reverses: dissolved salts return to the water and the lagoon regains its liquid character. It's during these transitional phases, when high salinity and sunlight favor halophile microorganisms, that the water can take on the pink tint typical of similar salt lagoons in Castilla-La Mancha. Laguna de Tirez is part of the Natura 2000 network and is protected both as a Natural Reserve and as part of a Biosphere Reserve. The site stands out for a variety of hypersaline-habitat flora rarely found elsewhere in Europe, including some species considered endangered. The landscape is open and steppe-like — low halophile scrub, bare saline flats, and the flat horizon typical of the interior Castilian plateau. How do you get there? Laguna de Tirez lies within the municipality of Villacañas, south of the town center. Villacañas is in the province of Toledo, Castilla-La Mancha, and is well connected to both Toledo and Madrid. The lagoon is best reached by car, following local roads out of Villacañas toward the region's protected wetlands (humedales). The area also forms part of the Caminos Naturales walking and cycling route, which links the La Mancha wetlands between Villacañas and Quero. When should you visit? The best time depends on what you want to see. Spring and early summer, right after the rainy season, is when the lagoon holds the most water and offers the best chance of spotting its characteristic coloring along with waterfowl drawn to the wet habitat. Late summer and autumn instead reveal a dry, salt-crusted landscape with white efflorescence covering the basin floor — a different but equally distinctive view of the lagoon. As a protected natural area, visitors should stick to marked paths and respect conservation rules. Frequently Asked Questions Why does the water in Laguna de Tirez sometimes turn pink? The pink tint appears seasonally and is linked to the lagoon's high salinity, which favors the growth of halophile microorganisms common in the shallow salt lagoons of Castilla-La Mancha. Does Laguna de Tirez dry up completely? Yes. During the summer months the water evaporates heavily and salt crusts form on the surface, turning the lagoon into a salt flat until rainfall refills it and restarts the cycle. What protection status does the site have? Laguna de Tirez is part of the Natura 2000 network, functions as a Natural Reserve, and belongs to a Biosphere Reserve, owing to its unique hypersaline-habitat flora. Are there other wetlands nearby worth visiting? Yes, Villacañas and its surroundings form part of a larger complex of La Mancha wetlands (humedales), linked by the Caminos Naturales route heading toward Quero.

Ibón de Cregüeña

Benasque

Ibón de Cregüeña is a glacial mountain lake near Benasque, in the Aragonese Pyrenees. Sitting at roughly 2,630 m above sea level on the southern slope of the Maladeta massif, within the Posets-Maladeta Natural Park, it is described in available sources as the largest glacial lake in Spain — around 1,500 m long, up to 500 m wide, covering about 43 hectares, with a depth reaching 97 m. How do you get there? The most common approach starts at the Refugio de la Renclusa, from where a trail follows the Cregüeña valley all the way up to the lake. An alternative route begins at the Paso Nuevo reservoir, joining the path toward the Vallibierna valley before climbing through the Cregüeña ravine to reach the same destination. Either way, this is a demanding hike: the round trip typically takes 5.5 to 6.5 hours, with substantial elevation gain along rocky, high-mountain terrain. It ranks among the tougher day hikes in the Benasque valley, so an early start, proper trekking boots, and a check of the mountain weather forecast are all worth planning for — conditions in this part of the Pyrenees can shift quickly. What will you see? What stands out first is the sheer size of the lake — this isn't a small tarn but a wide sheet of water framed by bare rocky slopes and peaks rising above 3,000 m. The Maladeta massif looms over the basin, one of the most recognizable ranges in this stretch of the Pyrenees. The surrounding area is one of the few places left in southern Europe where active glaciers still persist, with the Maladeta-Aneto glacial complex ranking among the most extensive in the entire range. The result is a landscape that mixes high-mountain starkness with the blue-green tone of the water, set against grey rock and patches of snow that linger on the slopes for much of the year. When should you visit? Given the altitude and terrain, the route is really only fully accessible in summer, from July to September, once most of the snow has melted and the path is passable without winter gear. Outside that window, snow patches can remain on the slopes, sharply raising both the difficulty and the risk of the hike. Aim for a clear-weather day — under cloud cover, the panorama of peaks ringing the lake loses much of its impact, and navigating the terrain becomes noticeably harder. Frequently Asked Questions Is the hike to Ibón de Cregüeña difficult? Yes — it's considered one of the more demanding routes in the Benasque valley, due to the distance, the substantial elevation gain, and the rocky high-mountain terrain on the final stretch of the approach. How long does the hike take? Depending on fitness level and the route chosen, the round trip usually takes between 5.5 and 6.5 hours. Is it really the largest glacial lake in Spain? Available sources indicate yes — Ibón de Cregüeña is cited as the country's largest glacial lake (ibón) by surface area. What's the best starting point? Two options are most common: starting from the Refugio de la Renclusa and following the Cregüeña valley, or starting from the Paso Nuevo reservoir via the Vallibierna valley.

La Grajera Reservoir

Logroño

La Grajera Reservoir sits just south of Logroño, the capital of La Rioja in northern Spain, roughly five kilometers from the city center. The reservoir runs alongside the Camino de Santiago, making it a familiar landmark for pilgrims walking west out of the city. How do you get there? La Grajera lies on the southern edge of Logroño, close enough to reach by bike or car within a short ride from downtown. Pilgrims walking the Camino de Santiago pass it naturally, since the route out of Logroño runs right alongside the reservoir — no detour needed. That combination of proximity and location on a major walking route means the reservoir draws both locals looking for a green space nearby and travelers pausing briefly during a longer journey. What will you see? The reservoir itself is the centerpiece: a wide stretch of water bordered by green space that has long served as a recreational area for the city. The surrounding grounds are set up for outdoor time — residents of Logroño come here to walk, cycle, or simply sit by the water away from the busier parts of town. La Grajera is also known among birdwatchers. The mix of open water, shoreline vegetation, and adjoining open land creates conditions that attract waterfowl and other species tied to wetland habitats, drawing in both casual visitors and more dedicated birdwatchers. Seen from the shore or from one of the paths that trace the water's edge, the reservoir offers the kind of calm, open view typical of this sort of site in La Rioja. When should you visit? Given the setting — an open body of water surrounded by green space — the warmer months make for the most pleasant visit, when longer days suit walking and lingering outdoors. For pilgrims on the Camino de Santiago, timing depends on the overall itinerary rather than the reservoir itself; La Grajera is simply one of the points passed after leaving Logroño, whatever the season. It's worth keeping in mind that this is primarily an open, natural area rather than a ticketed attraction with set visiting hours — visitors move freely along the paths that circle the water. Frequently Asked Questions Is La Grajera on the Camino de Santiago route? Yes, the reservoir sits directly alongside the Camino de Santiago on the stretch leaving Logroño toward the western part of La Rioja, so pilgrims pass it naturally on their walk. How far is La Grajera from central Logroño? It's about five kilometers south of the city center, making it easy to reach on foot, by bike, or by car. Is it a good spot for birdwatching? Yes, the wetland-like surroundings of the reservoir attract waterfowl and other bird species, making La Grajera a popular spot for nature observation in the La Rioja region. Is La Grajera a major tourist attraction or more of a local spot? It functions mainly as a recreational area for Logroño residents, but its location on the Camino de Santiago and its value for birdwatching also bring in visitors from outside the region.

Ibón de los Baños

Panticosa

Ibón de los Baños is a glacial mountain lake sitting right next to the Balneario de Panticosa spa, in the Tena Valley, in the Aragonese Pyrenees (Huesca province, Spain). Its cold, deep-blue water is framed by pine forest and rocky slopes, making it one of the most photogenic spots in the whole valley. Where exactly is it? The lake lies within the municipality of Panticosa, in the Alto Gállego region, at an altitude of over 1,600 metres. It's ringed by peaks above 3,000 metres — Garmo Negro, Argualas and Pondiellos — which gives the setting a genuinely high-mountain feel despite being relatively easy to reach. The historic Balneario de Panticosa spa complex sits right beside it, and gives the lake its name. How do you get there? The starting point is the Balneario de Panticosa itself, reached by road from the village of Panticosa along the Caldarés river valley. From the spa, a marked footpath leads up to the lake — there's no direct vehicle access to the shore. It's one of several trails departing from the spa area, rated moderate to hard depending on the exact route and time of year. The same area also serves as a starting point for longer hikes, including a stretch of the famous GR-11 (Senda Pirenaica) long-distance trail heading further toward the Ibones Azules. What will you see there? The path along the shore of Ibón de los Baños continues uphill to a spot known as Los Baños Viejos, home to the historic Fuente de Tiberio — a sulphurous, warm spring that flows even in winter. It's a remnant of the area's older spa tradition, from a time when these thermal waters drew visitors long before the modern balneario was built. More ambitious hikers can push on toward the Ibones Azules, two higher lakes (Superior and Inferior) reached via a route that climbs through a gorge carved by the Río Caldarés, with views opening up onto the surrounding 3,000-metre peaks. It's considered one of the classic day hikes of the Tena Valley. One thing to keep in mind: swimming in Ibón de los Baños, as in the other ibones of the region, is prohibited. The rule exists to protect these fragile high-mountain ecosystems, which are highly sensitive to human presence. When should you go? Late spring through early autumn is the best window, once the trails are clear of snow and the weather in this part of the Pyrenees is at its most stable. Summer brings the most visitors, drawn both to the ibón itself and to longer routes toward the Ibones Azules or the Bachimaña refuge. In winter, access to the higher stretches of trail can be difficult due to snow, though the Fuente de Tiberio spring keeps flowing year-round. Frequently Asked Questions Can you swim in Ibón de los Baños? No. Swimming is banned to protect the environment — the high-mountain lake ecosystems in this area are extremely sensitive to human disturbance. Can you drive right up to the lake? No. You need to reach the Balneario de Panticosa by road first, then continue on foot along a marked trail. Is the hike difficult? The walk to the ibón itself is generally moderate, but longer extensions, such as the route toward the Ibones Azules through the Caldarés river gorge, are more demanding and can take up most of a day. What else is worth seeing nearby? Beyond the lake, it's worth continuing to Los Baños Viejos to see the sulphurous Fuente de Tiberio spring, and, for fitter hikers, pushing on toward the Ibones Azules or a stretch of the GR-11 trail.

Ibón de Piedrafita

Búbal

Ibón de Piedrafita is a mountain lake in the Tena Valley, just above the village of Piedrafita de Jaca and close to Búbal, in the heart of the Aragonese Pyrenees (Huesca province). Sitting at roughly 1,611 metres above sea level, it's one of the most visited ibones in the region, mainly thanks to its easy access and the views from its shore. What exactly is an ibón, and how did this one form? In the Pyrenees, an "ibón" is the local name for a glacial mountain lake. Piedrafita occupies a basin created by a terminal moraine, and its surface was later enlarged with a small dam — at full capacity the lake can cover around 4.2 hectares. That makes it noticeably larger and more reliably full of water than many high-altitude ibones, which often shrink or dry out over summer. What will you see there? The main draw is the view. From the water's edge you get a clear line of sight to Peña Telera (2,764 m), the most recognisable peak in this part of the valley, along with Peña Parda (2,657 m) and Corona del Mallo (2,535 m). On calm days the surface mirrors these summits almost perfectly, which is why the spot is popular with photographers and anyone looking for a quiet break in the mountains. Nearby, it's worth seeking out the Arco de Piedrafita, a natural rock arch that frames one of the most striking views in the area — the valleys of Huesca, the Búbal reservoir, and the surrounding peaks all at once. How do you get to Ibón de Piedrafita? From Sabiñánigo, take the N-260 towards Biescas, then continue on the A-136 towards Piedrafita. Once you reach the Búbal reservoir (Embalse de Búbal), follow the signs towards the Parque Faunístico de Lacuniacha — the trails up to the lake start in this area. What's the hike like? The simplest option is a short approach from Piedrafita itself: about an hour of walking with roughly 250 metres of elevation gain. It suits families with children, first-time hikers, or anyone who just wants a low-effort walk to a scenic mountain lake. For a longer outing, there's also a circular route starting from Búbal that follows the Barranco de Boj stream. Depending on the exact variant, it runs about 5.7 to 8.4 km and takes anywhere from under two hours to nearly three, with 230 to 360 metres of elevation gain. Part of the path runs right alongside the stream, past water running between rocks, which is a highlight in its own right. When is the best time to visit? Ibón de Piedrafita is a viable destination almost year-round. In summer and autumn it makes for a relaxed family walk, while in winter — thanks to the modest elevation gain and proximity to the road — it's also a popular target for snowshoe outings when conditions allow. Frequently Asked Questions Is the hike to Ibón de Piedrafita difficult? No — it's one of the most accessible routes in the Tena Valley. The shorter approach takes about an hour with a modest climb, making it suitable for families and hikers with little mountain experience. How large is Ibón de Piedrafita? Thanks to the small dam that raised its water level, the lake covers around 4.2 hectares when full. Is there anything else worth seeing nearby? Yes — close by you'll find the Arco de Piedrafita, a natural rock arch with panoramic views over the Búbal reservoir and surrounding valleys, as well as the Parque Faunístico de Lacuniacha wildlife park. Can you reach the lake starting from Búbal? Yes, there's a circular route from Búbal via the Barranco de Boj ravine — longer and more varied than the short climb from Piedrafita.

Pozo Tremeo

Polanco

Pozo Tremeo is a small lake in Rumoroso, a village within the municipality of Polanco, on the coast of Cantabria, northern Spain. It is often described as the only permanent natural lake found along the Cantabrian coastal strip, tucked among meadows and woodland just inland from the sea. The site sits inside the boundaries of the Costa Quebrada UNESCO Global Geopark and has been protected since 2016 as an Área Natural de Especial Interés (ANEI) — at the time only the second such protected area to be designated in Cantabria, after La Viesca. What is the story behind its name? "Tremeo" comes from a Latin root meaning "to tremble." The lake formed when a section of limestone bedrock collapsed underground, a classic karst process, trapping water in the resulting hollow. Because the ground around the shoreline remains geologically unstable, visitors walking close to the water can sometimes feel it shift slightly underfoot — the origin of its nickname as "the lake that trembles." Local folklore has grown around that phenomenon for generations: tales of lovers who were never parted, wishes said to come true after touching the water, and rumors of underground tunnels connecting the lake to the sea. What will you see there? The lake itself is modest in surface area but unusually deep for its size, reaching down several meters more than one would expect from such a compact karst pool. It is ringed by a mix of deciduous woodland and damp meadowland typical of inland Cantabria. The area is a refuge for species tied to both water and forest habitats, including bats, beetles of conservation interest, and the native freshwater crayfish — a species particularly sensitive to water quality, whose presence is generally taken as a sign of a healthy ecosystem. A footpath circles the lake, allowing visitors to walk its perimeter and take in the view from several angles and shoreline heights. In recent years, regional authorities have carried out conservation work at the site, including measures aimed at preventing flooding and safeguarding the protected ANEI area — evidence that the lake is actively managed rather than simply protected on paper. How do you get there? Pozo Tremeo lies in Rumoroso, part of the municipality of Polanco, on the central stretch of the Cantabrian coast. Polanco sits along the main routes connecting Santander to the western part of the region, making the surrounding area a convenient base whether you are coming from the coast or from further inland. Given how understated the site is, it is worth checking local trail signage on arrival — this is a destination for a short, quiet walk rather than one built around heavy tourist infrastructure. When is the best time to visit? Since Pozo Tremeo is essentially a nature spot — woodland, meadow, and the lake itself — it rewards a visit outside the height of summer, when the light and vegetation are best suited to an unhurried walk and the area is quieter than the well-known beaches of the nearby Costa Quebrada. It suits travelers looking for stillness and a lesser-known, inland side of the Cantabrian coast rather than a typical beach outing. Frequently Asked Questions Is Pozo Tremeo really the only lake of its kind in Cantabria? It is generally described as the only permanent natural lake along the Cantabrian coastal strip, which makes it a distinctive geological feature in the region. Why is it called the "trembling lake"? Because of its karst origins and the instability of the ground around its edges — the earth near the water can genuinely shift slightly, a phenomenon that has fed local legends for centuries. Can you swim in Pozo Tremeo? Available sources do not list swimming as a typical activity here; the site is mainly visited for walking and nature observation, and its ANEI protected status comes with restrictions designed to safeguard the ecosystem. Is there a marked walking trail around the lake? Yes, a footpath runs around the lake allowing visitors to circle it and view it from different points, though it is a local walking route rather than an extensive signposted trail network.

Laguna de Carravalseca

Laguardia

Laguna de Carravalseca is a small, seasonal lake right next to Laguardia, one of the best-known towns of Rioja Alavesa in the Basque Country. It forms part of the Complejo Lagunar de Laguardia, a wetland complex listed under the Ramsar Convention as a wetland of international importance. Where is it and how do you get there? The lagoon sits about one kilometre from Laguardia's historic centre, surrounded by gentle hills and the vineyards that define the whole Rioja Alavesa landscape. The easiest way in is to take the road out of Laguardia toward Logroño, then follow the rural tracks that cut through the vineyards — the same route links up with a walking path connecting all the lagoons in the complex. It's an easy add-on for a short, relaxed walk rather than a full day trip. What will you actually see? Carravalseca is an endorheic lagoon with highly saline water, meaning it has no permanent outflow and its level depends heavily on the season and on rainfall. Autumn rains start refilling it, the water reaches its greatest depth in spring, and during the dry summer months the lagoon can dry out completely, exposing its salt-crusted bed. That variability means the landscape looks different every time you visit — sometimes a still sheet of water mirroring the vineyards and hills, sometimes a dry, cracked plain. Viewing points have been set up around the lagoons in the complex so visitors can watch birdlife without entering protected areas or disturbing the habitat. That's one reason the spot draws people interested in nature and birdwatching, even casual visitors without specialist gear. When should you go? Spring is the best time to see the lagoon at its fullest and most photogenic, while autumn — right after the first rains — is when it starts filling up again. In summer, at the peak of the dry season, the lagoon may be completely dried out; that's still an interesting sight, just a very different one, so keep it in mind if seeing open water is the main goal. Who is this for? Carravalseca and the other lagoons in the complex suit travellers looking for a quiet, low-key nature stop among the vineyards rather than a heavily built-up attraction. It pairs naturally with a visit to Laguardia itself — a walled historic town with plenty of wineries to explore — for anyone wanting to combine sightseeing with a short walk in nature. Frequently Asked Questions Does the lagoon always have water? No. Carravalseca is a seasonal lake — it fills with autumn rain, reaches its deepest point in spring, and can dry out completely in summer. How far is it from central Laguardia? About one kilometre, reached by road and rural tracks through the vineyards toward Logroño. Can you go birdwatching there? Yes, designated viewing points around the lagoons let visitors observe birds without disturbing their habitat. Is Carravalseca a protected area? Yes, it's part of the Complejo Lagunar de Laguardia, listed under the Ramsar Convention as an internationally important wetland.

Charcones de Punta Entinas

El Ejido

Charcones de Punta Entinas is a pair of semi-silted lagoons in the municipality of El Ejido, in the province of Almería, on the Andalusian coast. They sit between the Sabinar lighthouse (Faro del Sabinar) and the resort town of Almerimar, inside the protected natural area of Punta Entinas-Sabinar. This is one of the least human-altered wetlands anywhere in the province of Almería, which is exactly why it draws travelers looking for raw coastal nature rather than crowded beaches. What is there to see? The lagoons themselves are separated from the sea by a bar of sand and dunes, and they're surrounded by an extensive marsh and salt-marsh zone. Depending on rainfall and the season, the water level shifts, so the landscape can look like open sheets of shallow water one visit and dry, salt-crusted ground covered in halophytic plants the next. The lagoons form part of a larger natural site that combines four distinct environments: sandy beaches, one of the best-preserved dune systems on the entire Iberian Peninsula, dunes fixed by Mediterranean scrubland, and salt marshes dotted with small ponds. That mix of habitats makes Punta Entinas-Sabinar an important resting point for aquatic birds on migration, and it's why the area carries Special Protection Area for Birds (ZEPA) status and has been listed as a Ramsar wetland since 2006. How do you get there? Most visitors start from Almerimar, where a coastal walking and cycling trail runs toward the Sabinar lighthouse, cutting right through this part of the reserve. The route is flat and runs across open, shadeless coastal terrain, so bring water and sun protection whatever the season. Because the area is protected, vehicle access inside the natural site is restricted — walking or cycling along the marked paths is the practical way to explore it. When is the best time to visit? The Charcones de Punta Entinas are seasonal in character — water levels in the lagoons depend on rainfall and time of year, which changes what you'll actually see. Spring and autumn migration periods tend to be the most rewarding for birdwatchers, since the site functions as a stopover along migratory routes. In summer, strong sun and high temperatures across this open, treeless terrain can make longer walks tiring, so early morning or late afternoon visits work best. Why come here? This is a destination for travelers who value quiet, unspoiled landscape over tourist infrastructure. Unlike the built-up resorts elsewhere on the Almería coast, Punta Entinas-Sabinar remains largely undeveloped, offering a glimpse of what this coastline looked like before mass tourism arrived. The combination of dunes, beaches, salt marshes, and lagoons packed into one compact area makes it a worthwhile stop for anyone spending time in Almerimar or El Ejido. Frequently Asked Questions What exactly are the Charcones de Punta Entinas? They're two semi-silted lagoons separated from the sea by a sand and dune bar, located within the protected Punta Entinas-Sabinar natural area in the municipality of El Ejido. Is the area protected? Yes. It holds Special Protection Area for Birds (ZEPA) status, and since 2006 it has also been recognized as a Ramsar Convention wetland site. Where's the best place to start a walk here? Almerimar is the most common starting point, with a coastal trail leading toward the Sabinar lighthouse (Faro del Sabinar). Is there anything to do besides birdwatching? Yes — the terrain is well suited to walking and cycling among the dunes and beaches, and the dune-and-saltmarsh landscape itself is a draw for anyone interested in coastal ecosystems.

Estany de Malavesina

la Vall de Boí

Estany de Malavesina is a small glacial lake tucked into the high mountains above Vall de Boí, in the Catalan Pyrenees, sitting at roughly 2,490 metres above sea level. The lake itself covers only a modest surface area, but its setting among bare rock peaks makes it feel far more dramatic than its size suggests. Like most high-altitude glacial lakes in the region, the water shifts in colour from steel grey to deep turquoise depending on the light and the weather. Where is Estany de Malavesina? The lake lies in the Barranc de Riumalo valley, within the municipality of Vall de Boí, in the Alta Ribagorça region. It sits right next to the Aigüestortes i Estany de Sant Maurici National Park, one of the most highly regarded mountain areas in the Pyrenees. Several other small lakes dot the same valley, including Estany de Cavallers and Estany Cloto, forming a cluster of high-mountain tarns typical of this part of the range. How do you get there? The usual starting point is the car park at the Cavallers dam, at around 1,697 metres. From there, a trail climbs through the Barranc de Riumalo valley toward the lake. The terrain is properly high-mountain: rocky, steep in places, and unmarked in the way a lowland path would be. Anyone heading up should be reasonably fit, wear proper hiking footwear, and check the weather forecast beforehand — this isn't a casual stroll for inexperienced walkers. What will you see at the lake? Estany de Malavesina sits in a stark, rocky high-altitude landscape. Nearby peaks include Bessiberi (3,024 m) and Punta d'Harlé (2,877 m), two of the more distinctive summits in this stretch of the Pyrenees, visible from the lakeshore on a clear day. It's a spot for hikers looking for silence and raw, largely untouched mountain scenery, well away from the busier trails lower in the valley. The lake feeds the Barranc de Malavesina stream, which joins the Riuet d'Estany Negre near Pletiu de Riumalo, at an altitude below 1,900 metres — part of the wider water system that drains into the Vall de Boí. When should you visit? Given the altitude, the lake is really only accessible in summer, from June to September, once the snow higher up the valley has melted and the trail is passable. Outside that window, the ground around the lake is often still covered in snow or ice, which makes the approach difficult or impossible. It's also worth knowing that high-mountain lakes like this one in the Catalan Pyrenees sit within protected natural areas, so swimming is not allowed — a rule that applies across most of the region's mountain lakes to protect the fragile alpine ecosystem. Frequently Asked Questions Is Estany de Malavesina easy to reach? No. Getting there means a multi-hour mountain hike from the Cavallers dam car park, over steep and rocky terrain. It's a route for hikers with some trekking experience. Can you swim in the lake? No, swimming is prohibited. High-mountain lakes in this part of the Pyrenees are protected due to their sensitive ecosystem. What's the best time of year to visit? Summer, from June to September, when the trail is clear of snow. Earlier or later in the season, snow can still cover the area around the lake. Are there other lakes nearby worth visiting? Yes — Estany de Cavallers and Estany Cloto are both close by, forming part of a chain of high-mountain lakes in the Riumalo valley alongside Malavesina.

ibón de Marboré

Bielsa

Ibón de Marboré is a high-mountain lake in the municipality of Bielsa, inside the Ordesa y Monte Perdido National Park in the Aragonese Pyrenees. Sitting at roughly 2,600 m, it rests directly beneath the Monte Perdido massif, ringed by peaks over 3,000 m — Monte Perdido itself, Cilindro de Marboré, and Marboré. It's one of the most recognizable lakes in the entire Pyrenean range, largely thanks to its raw, high-altitude setting. Where is it located? The lake lies in the Pineta valley, one of the national park's four main valleys alongside Ordesa, Añisclo, and Escuaín. Pineta is generally considered the most alpine and dramatic of the four — its floor climbs steadily toward the Monte Perdido wall, and Ibón de Marboré sits on a high shelf almost under the glacier itself. How do you get there? The starting point is the car park in the Pineta valley, just before the former Parador Nacional. The trail crosses a bridge over the Cinca river, passes the Cascada del Cinca waterfall, and then climbs steeply up to the Balcón de Pineta — one of the more spectacular sections of trail anywhere in the Pyrenees. From there the route continues toward the Tucarroya pass and the lake itself. In total, hikers gain around 1,290 m of elevation from the valley floor. The climb typically takes about 5 hours, with the descent — including breaks — around 3.5 hours. It's a demanding day out, more because of the elevation gain than the distance. At the Tucarroya pass, at 2,661 m, stands the small Refugio de Tucarroya — a stone hut with 12 bunks, a table and chairs, where hikers can stay overnight if they're planning a longer stint in the high mountains. From the lake it's only about another half hour back down to the Balcón de Pineta, so many hikers treat the ibón as a bonus stop after reaching the balcony viewpoint. An alternative approach comes from the Ordesa valley side, via the Refugio de Góriz (2,200 m) and the Brecha de Rolando — a longer route that requires high-mountain experience and links the two valleys of the park. What will you see? The lake's glacial turquoise water contrasts sharply with the grey rock walls of Monte Perdido and Cilindro de Marboré rising directly above it. From the Balcón de Pineta viewpoint, one of the best-known panoramas in the Pyrenees opens up: the entire Pineta valley spread out below, with the peaks of the "Tres Marías" massif on the horizon. Those who continue up to the summit of Monte Perdido can look down and see Ibón de Marboré from above, with Pic Long visible in the background. When should you visit? This is a high-mountain route reaching above 2,500 m, so the realistic season for hiking up to the lake is summer — from around June/July through early autumn, once snow has cleared from the trail and the climb to Balcón de Pineta can be done safely without winter gear. Outside that window, it's worth checking current snow conditions, since the upper sections of the route are exposed and rocky. Frequently Asked Questions How long does it take to reach Ibón de Marboré? The ascent from the Pineta valley car park takes around 5 hours, with the descent — including breaks — taking about 3.5 hours. It's a full-day hike. Is the route difficult? Yes, mainly because of the elevation gain (around 1,290 m) and the altitude reached (roughly 2,600 m), rather than the distance itself. Good fitness and proper hiking boots are needed. Can you stay overnight near the lake? Yes — the small Refugio de Tucarroya, with 12 bunks, sits at the Tucarroya pass at 2,661 m. Where's the best place to start the hike? The most popular starting point is the car park in the Pineta valley, just before the former Parador Nacional, from where the trail climbs via the Balcón de Pineta.

Lago Cerveriz

Somiedo

Lago Cerveriz is one of the glacial lakes inside Somiedo Natural Park, in western Asturias, close to the border with Castilla y León. It belongs to the group known as the Saliencia Lakes, alongside Calabazosa (also called Lago Negro), Laguna de Almagrera, and La Cueva. The lake sits at an altitude of around 1,600 metres, surrounded by broad green highland meadows used as summer pastureland. How do you get there? The usual starting point is Pola de Somiedo, the park's main village, from where routes lead up toward the Saliencia valley. From there, a circular trail connects the area's four main lakes — Calabazosa, Cerveriz, Laguna de Almagrera, and La Cueva. Since this is mountain terrain, it's best to plan a visit outside the snow season and check current trail conditions at the park's information point beforehand, as access to Somiedo's high country can be seasonally restricted. What will you see? Lago Cerveriz offers a quiet, rugged scenery — a still body of water framed by green pastures and the rocky slopes typical of a glacial landscape. Walking the full Saliencia Lakes route reveals how varied this shared glacial origin can look: each of the four lakes has its own character despite forming through the same geological process. The surrounding meadows also serve as a habitat for local wildlife, making the area appealing both to landscape photographers and to anyone looking for quiet trails away from the busier routes in the park. When is the best time to visit? The circular route linking the four Saliencia lakes is often described as one of the easier, shorter options in the park, which makes it a reasonable choice for families with children compared to longer, more demanding hikes elsewhere in Somiedo. Late spring through early autumn is generally the best window, when trails are fully accessible and the meadows around the lake turn green. Weather at these altitudes can shift quickly, so it's worth packing proper layers even in summer. Frequently Asked Questions Is Lago Cerveriz the only lake in this part of the park? No — Cerveriz is one of four lakes that make up the Saliencia Lakes group, together with Calabazosa (Lago Negro), Laguna de Almagrera, and La Cueva. A popular circular route allows visitors to see all four on a single outing. How was the lake formed? Lago Cerveriz is a glacial lake, shaped by the glaciers that once carved out Somiedo's mountain valleys. That history explains the rocky terrain surrounding the water today. Is the route suitable for families with children? Yes, the circular hike around the Saliencia Lakes is generally considered one of the easier and shorter options in the park, which is why it's often recommended for families and for hikers looking for a less demanding route. Where should the trip start? Pola de Somiedo is the natural reference point — it's where visitors can check current trail conditions and find the way toward the Saliencia valley, where the walk up to the lakes begins.

estany de Buixasse

la Guingueta d'Àneu

Estany de Buixasse is a small mountain lake in the municipality of la Guingueta d'Àneu, in the Pallars Sobirà region, deep in the Catalan Pyrenees. It sits close to the Aigüestortes i Estany de Sant Maurici National Park, above 2,000 metres in altitude, surrounded by a classic high-alpine setting of bare granite ridges, summer pastures and sparse mountain vegetation. Where exactly is estany de Buixasse? The lake lies in a side valley branching off the Àneu valley, separated by the Serra Mitjana ridge (2,620 m) from the parallel Unarre valley. This is not a roadside spot: reaching it means a multi-hour hike up from the valley floor, typically starting near la Guingueta d'Àneu or one of the neighbouring villages of the Vall d'Àneu. Its approximate coordinates are 42.69°N, 1.16°E. What will you see at the lake? Buixasse is one of several high-altitude lakes clustered in this stretch of the Pyrenees, alongside estany de Tartera, estany de Calberante and estany de la Gola, all sitting above the 2,000-metre mark. Together they form a natural chain of scenic stops on a circular hiking route that is generally considered demanding and best suited to experienced mountain walkers. The lake itself, ringed by rocky slopes, stands in sharp contrast to the barren, almost lunar high-mountain terrain around it — a quiet spot, far from the more crowded, better-known trails of the range. Keep in mind that the route runs through open high-mountain terrain with no tourist infrastructure: there are no refuges or service points right at the lake, so a visit requires bringing your own supplies and gear and planning the day carefully. When is the best time to visit? Given the altitude, snow can linger around the lake well into spring, and in many years the trail is realistically walkable only from June to September. Early summer brings meltwater feeding the lake and nearby streams, with the still snow-capped peaks framing vividly green pastures below. Late summer and early autumn tend to offer more stable weather and longer daylight, making it easier to plan a full day's outing into such remote terrain. Because of the high-mountain character of the route, it's worth checking the weather forecast right before setting out — conditions above 2,000 metres in the Pyrenees can shift quickly, even in summer. Frequently Asked Questions Can you drive to estany de Buixasse? No. The lake sits in high-mountain terrain reachable only on foot, starting from a parking area or trailhead down in the valley near la Guingueta d'Àneu. How long does it take to reach the lake? The approach runs through terrain above 2,000 metres and is multi-stage, so it calls for good fitness and a full day of planning — this is an outing for prepared, experienced hikers rather than a short stroll. Are there other hiking highlights nearby? Yes — estany de Tartera, estany de Calberante and estany de la Gola sit in the same area and, together with Buixasse, make up a circular route popular with high-mountain hiking enthusiasts. Is it part of the Aigüestortes National Park? The lake lies right next to the Aigüestortes i Estany de Sant Maurici National Park, in a region known for its dense network of glacial-origin mountain lakes.

Estany del Pessó d'Amont

la Vall de Boí

Estany del Pessó d'Amont is a high-mountain glacial lake in the municipality of la Vall de Boí, tucked away in the side valley of Coma del Pessó in the Catalan Pyrenees. Sitting at close to 2,500 metres above sea level within the peripheral zone of the Aigüestortes i Estany de Sant Maurici National Park, it counts among the highest — and deepest — bodies of water in the area. Where exactly is this lake? Estany del Pessó d'Amont lies in the comarca of Alta Ribagorça, part of the Vall de Boí valley famous for its UNESCO-listed Romanesque churches. It is the upper lake ("d'Amont") of a pair known as the Estanys del Pessó — the other, lower one, is Estany del Pessó d'Avall. Water flows down from the upper lake into the lower one, forming a distinctive tiered pair of alpine tarns within a single glacial cirque. Because of its size it is sometimes also referred to as Estany Gran del Pessó. How do you get there? The approach is on foot from the Sant Martí valley side of la Vall de Boí. It's a demanding high-mountain Pyrenean hike, climbing steadily up the valley until it reaches a rocky threshold opening onto the cirque where both lakes sit. Reaching the upper lake alone takes roughly three hours one way, and the full round trip typically runs to around six hours of walking. Start early, wear proper trekking footwear, and carry your own water and food — there are no supply points along the route. What will you see there? Estany del Pessó d'Amont reaches a depth of 32 metres, making it one of the deeper lakes in this part of the Pyrenees. It sits ringed by a crown of unmistakably alpine peaks — the panorama takes in Tuc dels Carants, Pic Roi, and Pic Gran and Pic Petit del Pessó. The setting is a classic glacial cirque: bare granite walls, sweeping valley views below, and a deep blue-black sheet of water set against pale rock. The name "pessó" comes from a word for a conical haystack, describing the cone-like shape of the surrounding summits. When is the best time to visit? Given its altitude above 2,400 metres, the lake is only reliably accessible from late spring through early autumn — the best window runs roughly from June to September, once most of the snow has cleared and the trail is passable. Outside that window, snow can still linger on the final stretch of the approach, so it's worth checking current trail conditions before setting out. Frequently Asked Questions Do you need serious mountaineering experience to reach the lake? The hike is long and climbs into high terrain, but it doesn't require climbing gear. Reasonable fitness, solid footwear, and planning for a full day out are enough. What's the difference between Estany del Pessó d'Amont and Estany del Pessó d'Avall? They are two lakes in the same valley arranged one above the other — d'Amont sits higher up and feeds water down into the lower d'Avall. Can you camp near the lake? The lake lies within the peripheral zone of a national park, so it's worth checking the current seasonal rules on camping in the area before planning an overnight stay. Where does the name "Pessó" come from? It refers to the conical shape of the surrounding peaks, likened to a haystack — the same root gives the neighbouring summits Pic Gran and Pic Petit del Pessó their names.

Chorro Grande

Segowia

Chorro Grande is the tallest waterfall in the Sierra de Guadarrama, tucked into forested slopes on the range's northwestern side, within the municipality of Palazuelos de Eresma in the province of Segovia, Castile and León. The water drops in three successive stages down a near-vertical gneiss rock face, adding up to a fall of roughly 80 metres — an unusually dramatic sight for central Spain. How do you get there? The hike to Chorro Grande starts in La Granja de San Ildefonso, the small town best known for its Royal Palace and gardens. From there, a marked trail climbs steadily up the mountainside toward the falls. The route is open year-round, and its difficulty can be adjusted by choosing shorter or longer, easier or steeper stretches. Sturdy hiking boots are worth packing, since the path narrows in places and low vegetation closes in higher up the slope. What will you see? The waterfall itself sits at around 1,530 metres above sea level, framed by a forest of Scots pine that gives way in places to oak woodland. Its three drops are separated by small natural pools, so instead of one single plunge, hikers encounter a sequence of striking cascades. The higher the trail climbs, the wider the views open up — from near the top you can look out over La Granja and Segovia itself, and on clear days pick out the Valsaín valley along with the peaks of Peñalara and Siete Picos. When is the best time to visit? Spring is the prime season, when melting snow and winter rainfall keep the falls running at full strength and the surrounding forest turns a deep green. By summer and autumn the flow tends to thin out noticeably, though the trail itself stays scenic all year. Winter hikes are best avoided by casual visitors — snow accumulates on the upper sections, making the route considerably harder and suitable only for experienced, well-equipped hikers. Frequently Asked Questions Is Chorro Grande the tallest waterfall in the Sierra de Guadarrama? Yes, it is the highest waterfall in the entire Sierra de Guadarrama range, falling in three stages that together reach around 80 metres. Where does the trail to the waterfall begin? The route starts in La Granja de San Ildefonso, the town famous for its Royal Palace, and climbs uphill through pine forest toward the falls. Is the hike suitable for beginners? Difficulty can be tailored by picking shorter or longer segments, but the upper stretches narrow and require reasonable fitness and proper footwear. When does the waterfall carry the most water? Spring, right after winter snow has melted, is when the flow is strongest and the falls are most impressive.

Ibón de Sabocos

Panticosa

Ibón de Sabocos is a mountain lake in the Aragonese Pyrenees, in the province of Huesca, near the town of Panticosa. The word "ibón" comes from Aragonese and refers to a glacial lake — a term used across this part of the Pyrenees for the many high-altitude bodies of water scattered above the valleys. Sabocos sits at an elevation of roughly 1,905 metres and reaches a maximum depth of about 25 metres, making it one of the deeper ibones in the area. Where exactly is Ibón de Sabocos? The lake lies in the high mountain section of the Panticosa municipality, in the heart of the Aragonese Pyrenees. It's a genuinely alpine setting, surrounded by rocky ridges and pastureland, well above the valley floor. Panticosa itself — known mainly for its spa and ski resort — is the natural base for anyone planning a hike up to the lake. How do you get there? Ibón de Sabocos sits in a zone with no vehicle access — reaching it means hiking a mountain trail, as is the case with most ibones in this part of the Pyrenees. The route typically starts from around Panticosa or one of the nearby mountain trailheads, climbing through pasture and rocky terrain up to the lake basin. Given the altitude — close to 1,900 metres — it's worth setting off with plenty of time in hand and checking the weather forecast beforehand, since conditions in the higher reaches of the Pyrenees can shift quickly even in summer. What will you see once you're there? The main draw is the lake itself: a still, high-altitude body of water set against the rocky backdrop typical of the Aragonese Pyrenees. At nearly 25 metres deep, the water often takes on intense dark blue and grey tones on sunny days, standing out sharply against the surrounding rock. It's a place defined by quiet and open space, well away from the noise of valley towns — best appreciated by hikers and landscape photographers. The area around the lake also serves as a starting point for further routes into the higher Aragonese Pyrenees, though any onward route should be planned with a proper map and up-to-date local trail information. When is the best time to visit? Summer — roughly June through September — is the best window for hiking up to Ibón de Sabocos, once snow at higher elevations has generally cleared and the trails are passable. Early summer can still see patches of snow lingering near the lake, so it's worth factoring that into route planning. In autumn and winter, the high-altitude sections often become difficult to access or close outright due to snow, making this a poor season for the average day hiker. Frequently Asked Questions Can you drive directly to Ibón de Sabocos? No — the lake sits in a high mountain zone with no road access, and reaching it requires hiking a trail, as with the other ibones in the Aragonese Pyrenees. How deep is the lake? Ibón de Sabocos reaches a maximum depth of around 25 metres. At what altitude does the lake sit? It lies at an elevation of about 1,905 metres, in the mountainous part of the Panticosa municipality. What does "ibón" mean? It's the Aragonese word for a glacial lake — a term widely used across the Aragonese Pyrenees for the numerous high-altitude lakes formed by past glacial activity.

Laguna Larga

Villacañas

Laguna Larga is a saline, seasonally fluctuating lake in the municipality of Villacañas, in the province of Toledo, Castilla-La Mancha. Covering roughly 84 hectares, it forms part of the Villacañas wetland complex, one of the most significant wetland areas in central Spain. What makes Laguna Larga worth a visit? Laguna Larga is an endorheic lake — it has no outflow to any river, so water only leaves through evaporation and seepage. By nature it should dry out seasonally under the summer heat, but treated wastewater from a nearby treatment plant keeps flowing into its basin, so the lagoon holds water almost year-round even though it stays shallow, rarely exceeding two metres in depth. Salinity here runs higher than in the open sea, an extreme condition that supports dense populations of microcrustaceans and algae. Those tiny organisms form the base of the food chain that draws flamingos and shoveler ducks, which filter-feed on the plankton-rich water. What kind of nature surrounds the lagoon? The vegetation is classic halophytic scrub adapted to salty ground, dominated by albardín, a tough grass that colonises the lake margins and salt meadows. Together with the lagoons of Peña Hueca, Tirez, La Redondilla and La Gramosa, Laguna Larga forms a protected network covering close to 380 hectares of seasonally flooded surface. The whole complex lies within the "Humedales de La Mancha" area, designated a Site of Community Importance (LIC) and a Special Protection Area for Birds (ZEPA) under the EU's Natura 2000 network. How do you get to Laguna Larga? The lagoon sits on the outskirts of Villacañas, a small town in Toledo province well connected by road to both Madrid and Toledo. A stretch of the "Camino Natural" walking and cycling route linking Villacañas and Quero passes directly through the La Mancha wetlands and past the lagoon. On site, two purpose-built viewpoints let visitors watch the wildlife without disturbing it — one on the northern edge set up for flamingo watching, and another on the western side facing the shoreline birds and waders. What will you see there? The landscape shifts dramatically with the seasons and water level, from a wide silvery sheet of water to dry, cracked salt flats crusted white with mineral deposits. Early morning and evening are the best times for birdwatching, when the light is soft and bird activity peaks. The site stays quiet and largely free of crowds, making it a favourite with nature photographers and birders rather than a mass-tourism stop. When should you visit? Autumn, winter and early spring bring the highest water levels and the largest numbers of migratory birds, making this the prime window for a visit. In summer, under the intense heat typical of Castilla-La Mancha, the surrounding vegetation dries out and several neighbouring lagoons lose their water — Laguna Larga itself, however, usually stays moist thanks to its steady supply of treated water. Frequently asked questions Is Laguna Larga a freshwater lake? No — it is a saline lake with salinity higher than seawater, which shapes the distinctive plant and animal life found here. Can you see flamingos at Laguna Larga? Yes, a dedicated viewpoint on the northern shore is set up specifically for observing flamingos, which feed on the microorganisms living in the salty water. Does the lagoon dry up in summer? Unlike many neighbouring lagoons, Laguna Larga usually keeps water throughout the year thanks to the inflow of treated wastewater from the local treatment plant. Is the lagoon part of a larger protected area? Yes — it belongs to the Villacañas wetland complex, which also includes the Peña Hueca, Tirez, La Redondilla and La Gramosa lagoons, protected under the EU's Natura 2000 network.

Estanys de la Montanyeta

la Torre de Cabdella

Estanys de la Montanyeta is a group of three small glacial lakes in the municipality of La Torre de Cabdella, tucked into the Vall Fosca valley in the Pallars Jussà region of Catalonia. The lakes sit at an altitude of roughly 2,600–2,650 metres, with the largest covering only about half a hectare. They form part of a network of more than thirty high-mountain lakes scattered across Vall Fosca — a valley that serves as the southern gateway to the Aigüestortes i Estany de Sant Maurici National Park. How do you get there? The starting point for exploring the lakes is the Vall Fosca valley, reached by a local road from Pobla de Segur toward La Torre de Cabdella. From there, the approach continues on foot, typically starting near the Sallente dam or the base of the funicular that runs up to Estany Gento, from where mountain trails climb toward the upper reaches of the valley where Estanys de la Montanyeta lie. Given the altitude and terrain, it's worth planning the hike as a full-day outing, with proper footwear and enough water for the climb. What will you see? The three small lakes, known locally as "laquets," create a quiet, rocky landscape typical of the high Pyrenees — framed by granite outcrops, alpine meadows and the visible traces of the glaciers that carved out the Vall Fosca valley. The water has a distinctive, clear turquoise tone, and the views over the surrounding peaks rank among the most striking in the Pallars Jussà region. This is a spot for travelers looking for quiet and genuine mountain scenery, away from the busier paths inside the main body of the national park. When should you visit? Summer, from June to September, is the best window, once snow clears from the high trails and temperatures allow for comfortable hiking. In spring and autumn some sections can be harder to reach due to lingering snow or unstable weather, while in winter the valley turns into ski-touring terrain that calls for proper gear and mountain experience. Why is it worth the trip? Vall Fosca carries a strong hydroelectric heritage — since the early 20th century, the drop in elevation from these mountain lakes has been harnessed to generate electricity, a history still visible in the Sallente dam and the historic funicular up to Estany Gento. The hike to Estanys de la Montanyeta lets visitors combine that engineering history with genuine, largely untouched Pyrenean wilderness. Frequently asked questions Is the hike to the lakes difficult? The route calls for a reasonable level of fitness, crossing rocky high-mountain terrain above 2,600 metres. It's not a walk for beginners, but it's fully manageable for experienced hikers in good weather with the right preparation. Are there other lakes worth seeing nearby? Yes, Vall Fosca has more than thirty glacial lakes, so the route can easily be extended or combined with a visit to neighboring lakes such as Estanys de Carboneres. Is there anywhere to stay overnight in the area? Vall Fosca and the area around La Torre de Cabdella have mountain refuges and lodging options in the lower part of the valley, making it possible to plan a multi-day exploration of the region. Are the lakes accessible year-round? Because of the altitude and snow cover, the easiest hiking access runs from June to September. Outside that window, reaching the lakes requires winter-appropriate gear and skills.

Redon Lake

Vielha e Mijaran

Redon Lake (Estany Redon) is a glacial mountain lake in the municipality of Vielha e Mijaran, in the Val d'Aran valley of the Catalan Pyrenees, sitting at more than 2,200 meters above sea level. Ringed by bare rocky peaks and the sparse vegetation typical of the high Pyrenees, it is a favorite destination for hikers setting out from the Vielha tunnel area. How do you get to Redon Lake? The usual starting point is the car park by the Conangles refuge, right at the mouth of the Vielha tunnel (Espitau de Vielha). From there, the GR-11 long-distance trail climbs toward the Port de Vielha pass. At around 2,120 meters a signposted junction branches off toward the lake. The full approach from the car park to the lake typically takes two to two and a half hours, depending on pace and trail conditions. No climbing gear is needed, but the path crosses rocky, high-mountain terrain, so sturdy hiking boots, trekking poles, and layers for changeable weather are worth packing — even summer afternoons in the Pyrenees can turn cold and wet without much warning. What will you see there? Redon Lake sits among a cluster of well-known high points in this stretch of Val d'Aran. Tuc deth Port de Vielha (2,606 m) rises nearby, and the trail continues over the Coret deth Redon pass (2,454 m) toward a second lake, Estany de Rius (2,320 m). Many hikers link the two lakes into a single loop of roughly 11 kilometers, rated as a difficult route. The lake itself, framed by bare rock and patches of snow that can linger well into summer, is a textbook example of a glacial landscape — deep blue-green water and a quiet that's harder to find in the busier parts of the valley below. When is the best time to visit? Summer, from June to September, is the best window for hiking to Redon Lake, when the trail is generally clear of snow and rainfall is limited. Earlier in the season, in May and especially June, snow can still cover the higher stretches of the route and the lake basin itself, making the approach slower and requiring extra caution. Because the trail sits above 2,000 meters, it's worth checking the forecast right before setting out — storms and fog can roll in quickly at this altitude and cut visibility on the trail with little warning. Frequently asked questions How long does it take to reach the lake? From the car park at the Vielha tunnel, reaching the trail junction and then the lake usually takes two to two and a half hours one way. Is the trail suitable for beginners? The route runs through rocky, high-mountain terrain and calls for reasonable fitness and proper footwear. Hikers without much experience in the high Pyrenees should build in extra time and check the weather beforehand. Can Redon Lake be combined with other lakes on the same hike? Yes — a popular loop links Redon Lake with the nearby Estany de Rius via the Coret deth Redon pass, covering about 11 kilometers total and rated as a difficult trail. What's the best time of year to go? The summer months, from June to September, when the trail is free of snow and conditions are most stable.

Cascada del Aliviadero

Villacarrillo

Cascada del Aliviadero is a small but striking waterfall in the municipality of Villacarrillo, in the province of Jaén, formed at the spillway of the Aguascebas reservoir dam. It sits at the heart of the Sierra de las Villas, inside the Sierras de Cazorla, Segura y las Villas Natural Park, one of the largest protected areas in Andalusia. Where does the waterfall come from? The Aguascebas reservoir was built in 1967 and holds a usable capacity of around 6.37 hm³. When heavy rainfall pushes the water level above the dam crest, it spills over the top — that overflow (aliviadero in Spanish) is exactly what creates the cascade visible from below. This means the waterfall isn't a permanent feature: its flow depends directly on the reservoir's water level, and it can dry up completely during long dry spells. What will you see there? Water from the spillway feeds the Arroyo de las Aguascebas Chico stream, which further down the same ravine forms Andalusia's tallest waterfall, the Cascada de la Osera, dropping around 130 meters. Many visitors combine both cascades in a single hiking route, crossing the rocky, forested terrain typical of the Sierra de las Villas — pine woods, limestone cliffs, and deep river valleys. How do you get there? The usual starting point is Villacarrillo or nearby trails leading to the Aguascebas reservoir. Hiking routes connect Cascada del Aliviadero with other water features in the area, such as the Cascada de Chorrogil. Because the terrain is uneven and rocky, sturdy trekking shoes and a reliable sense of orientation are recommended — the trails have minimal tourist infrastructure, which is part of their appeal. When should you visit? The best time to visit is late winter through spring (February to May), when the reservoir is full after the rainy season and the spillway runs at its strongest. In summer, after long dry periods, the waterfall often dries up or slows to a trickle, so it's worth checking recent rainfall or trip reports before setting out. Frequently asked questions Does Cascada del Aliviadero flow all year round? No. It's a rain- and reservoir-dependent waterfall that mainly appears after rainfall and during periods of high water levels in the Aguascebas reservoir, and it can dry up in the drier months. Can you reach it without a guide? Yes, the area is accessible to independent hikers following the trails through the Sierra de las Villas, though a map or GPS app is useful since signage is minimal. Is it worth combining with a visit to Cascada de la Osera? Definitely — both cascades lie in the same ravine, and many popular routes link them into a single hike, letting you see Andalusia's tallest waterfall on the same trip. Is this suitable for families with children? It depends on the children's age and fitness — the terrain is uneven and requires some hiking experience, but with good weather and a moderate pace the route is manageable for older kids.

A Cenza Grande

Vilariño de Conso

A Cenza Grande is the local name for the striking waterfall on the Cenza River in the municipality of Vilariño de Conso, in the province of Ourense, Galicia. The Cenza rises in the Serra da Queixa mountain range and, right by the village, tumbles down in a series of steps over a drop of roughly 100 to 105 metres, making it the tallest stepped waterfall in all of Galicia. Locals also refer to it as Fervenza do Cenza, Salto do Cenza, or Ola do Cenza — all names for the same dramatic cascade over the granite rock face. How do you get there? The starting point is the village centre of Vilariño de Conso. Right at the edge of the village, two signposts mark two different routes. The path to the right leads along a wooden walkway to a viewpoint at the very top of the waterfall, where you can watch the water plunge below. The path to the left runs through a series of wooden boardwalks and lookout platforms overlooking different stretches of the river and its successive water steps. The first stop along this route is the Poza Moura viewpoint, and the path continues on to the Penedo Redondo viewpoint further along. The full round trip covers about 3.2 kilometres. The climb is fairly steep in places, and the stone path can get slippery after rain, so sturdy footwear and a bit of caution near the platform edges are a good idea. What will you see along the way? The main draw is the waterfall itself — a powerful cascade dropping over a hundred metres down a series of granite ledges, framed by the region's typical mountain vegetation. Along the walk you pass a string of natural pools and smaller water steps carved out by erosion of the granite bedrock. The area around Vilariño de Conso is also home to the Cenza glacial cirque, a remnant of the region's glacial past that shaped the distinctive terrain around the river's upper course. Hikers looking to extend the day can pick up additional marked trails in the municipality, including the 9.7-kilometre loop to Cerveira Castle (PR-G 146), which pairs well with a visit to the waterfall for a fuller day out in the area. When is the best time to visit? Autumn, winter, and early spring are the best times to visit, when rainfall and melting snow from the Serra da Queixa feed the river and the waterfall runs at full strength. In summer the flow drops noticeably, though the walking route stays open and pleasant, with drier, less slippery paths. Frequently asked questions Is there an entry fee for the waterfall? No, access to the viewpoints and walkways is free and follows public municipal trails. Is the route suitable for children? The stretch to the nearest viewpoints is short, but given the steep sections and wooden walkways above steep drops, keep a close eye on young children. How long does the full visit take? Walking the complete 3.2-kilometre round trip with stops at the viewpoints usually takes about 1.5 to 2 hours. Can you swim in the natural pools near the waterfall? Some of the pools, such as Poza Moura, are visited during the warmer months, but the current and depth near the waterfall's steps call for real caution.

Cascada del Huevo

Real Sitio de San Ildefonso

Cascada del Huevo is a forest waterfall in the Montes de Valsaín, within the municipality of Real Sitio de San Ildefonso (Segovia province), on the northern slope of the Sierra de Guadarrama. Water tumbles over a series of rocky steps set among pine woods, forming one of several small cascades along the streams that run down toward Valsaín. How do you get there? The usual starting point is La Pradera de Navalhorno, reached from the CL-601 road (around kilometer 10), where the old Aserradero sawmill building now houses the Centro de Montes de Valsaín and a small car park. From there, a marked route combines forest track, footpath, and a short stretch of paved road. No mountaineering experience is needed — the technical difficulty is rated easy — though the overall walking time can stretch to several hours if you choose a longer loop linking multiple sights. What will you see along the way? Cascada del Huevo is rarely visited in isolation. Popular routes continue on to Silla del Rey, a rocky viewpoint, and to a second nearby waterfall, Cascada de la Chorranca. Along the way, hikers also pass Cueva del Monje and Cerro del Puerco, a hill tied to Spanish Civil War history (the battle for La Granja). The whole area sits within a dense Scots pine forest typical of the Montes de Valsaín, historically managed as timber woodland for the royal court and local communities. When is the best time to visit? Water flow is strongest in spring and early summer, once snowmelt from the higher parts of the Guadarrama feeds the streams. In summer, especially during dry spells, the waterfall can shrink to a much thinner trickle, while in autumn and winter the ground around it tends to be damp or slippery, so sturdy footwear is worth packing. The forest cover keeps the route shaded even in warmer months, making it a reasonable option in July and August as well. What should you know before setting out? The trail runs through managed forest in a protected area, so it's best to stick to marked paths and carry out any rubbish. There are no cafés or shops along the way — bring water and food from Valsaín or La Granja de San Ildefonso beforehand. Mobile signal can be patchy deeper in the forest, so it helps to let someone know your planned route. Frequently asked questions Is Cascada del Huevo suitable for children? Yes, if you take the shorter approach from La Pradera de Navalhorno. Most of the path is flat or gently sloped, though the ground near the waterfall itself can be uneven and wet. How long does it take to reach the waterfall? It depends on the route chosen. A direct walk from the Aserradero car park usually takes 30 to 60 minutes each way, while a longer loop connecting several nearby sights can take more than 5 hours in total. Is there an entrance fee? No, the forest area is free to access, though parking at the Aserradero is limited and can fill up on weekends. Is the waterfall visible year-round? Not always at full strength — during dry summer months the flow can be very weak or barely visible, so spring generally offers the best views.

Nature in Spain