Lezetxiki

Lezetxiki is an archaeological cave in the municipality of Arrasate / Mondragón in the Basque Country, ranked among the most important paleoanthropological sites on the Iberian Peninsula. It sits on the eastern slope of Mount Bostate, in the Garagarza district, right next to the valley of the Kobate stream.

Why is Lezetxiki significant?

The occupation sequence found in the cave spans more than 300,000 years, making it one of the oldest sites in the entire Basque Country. Excavations have yielded a humerus from a Homo heidelbergensis woman dating to the Lower Paleolithic, a premolar, a molar and shell pendants attributed to a Neanderthal from the Middle Paleolithic, and a jaw fragment belonging to Homo sapiens. These finds place Lezetxiki among the ten most important classic Paleolithic sites on the Iberian Peninsula.

The first excavations ran from 1956 to 1968 under the priest José Miguel de Barandiarán, a pioneer of Basque archaeology. Since 1996, fieldwork has continued under Álvaro Arrizabalaga, a professor at the University of the Basque Country. In 2022 the Basque Government declared the Lezetxiki archaeological zone and its surroundings a Specially Protected Cultural Asset, in the Archaeological Zone category.

How do you get there?

The cave lies in the Garagarza district on the outskirts of Arrasate / Mondragón, in the Deba river valley in the province of Gipuzkoa. It's a few minutes by car from the town centre; the approach road leads toward the slopes of Mount Bostate, from where signposted walking trails run down toward the Kobate stream valley. The site is a well-known stop on hiking routes linking Garagarza with the surrounding hills.

What will you see?

The cave entrance and the surrounding mountain landscape along the stream valley give a strong sense of the conditions in which people lived here for hundreds of thousands of years. Because of its scientific value and the excavation work still underway, the site isn't freely open — visits happen through occasional guided tours organized by local tourism bodies, including the Debagoiena tourism office. On these tours, guides explain the history of the digs and the significance of the finds, and often share the local folklore tied to the cave, including tales of the lamiak, mythical water-spirit figures from Basque legend said to haunt the area.

When should you visit?

Spring and summer are the best times to come, since that's when themed guided tours of the caves in the Debagoiena region, including Lezetxiki, tend to be scheduled. It's worth checking the current events calendar with the Arrasate / Mondragón town hall or contacting the local tourism office beforehand, since access to the cave interior is limited and regulated because of ongoing scientific research.

Frequently asked questions

Can you enter Lezetxiki cave on your own? No — because of its status as a protected archaeological site with active excavations, entry to the interior is only possible as part of organized guided tours.

What was found inside Lezetxiki? Finds include a Homo heidelbergensis humerus, Neanderthal teeth and shell pendants, and a Homo sapiens jaw fragment — traces of several human species that occupied the site over more than 300,000 years.

Who has excavated Lezetxiki? The first excavation campaign (1956–1968) was led by José Miguel de Barandiarán. Since 1996, research has continued under a team from the University of the Basque Country directed by Álvaro Arrizabalaga.

How far is Lezetxiki from central Arrasate / Mondragón? The cave is in the Garagarza district, a few minutes' drive from the town centre, at the foot of Mount Bostate.