The caves are carved into limestone dating back to the Cretaceous period.
Excavations have uncovered remains of the cave bear (Ursus spelaeus), a species that went extinct roughly 24,000 years ago.
The site is deeply linked to the mythological figure Jentil, giant beings from Basque folklore believed to have lived in these caves.
The caves were traditionally used by smugglers and refugees during times of political instability due to their proximity to the Spanish border.
The cave temperature remains constant at approximately 14 degrees Celsius throughout the year.
Botanical trails surrounding the caves offer views of the distinctive Xareta region landscape.
The Megalithic Park on the site features models that explain the construction techniques of prehistoric burials found in the Basque mountains.
The Grottes de Sare are a network of karst caves located at the base of Mount Axuria in the French Basque Country, renowned for their geological importance and connection to Basque mythology. The site features a developed walking circuit that highlights subterranean formations alongside exhibitions on the prehistoric occupation of the site. Excavations have revealed evidence of human presence dating back to the Upper Paleolithic period. The caves serve as an important habitat for several species of bats, which are monitored for conservation purposes. A megalithic park is situated on the grounds, showcasing life-size replicas of prehistoric structures including dolmens and cromlechs. The visitor experience is strictly guided to protect the cave environment and provide context on the region's cultural history. The site operates as a pedagogical center focusing on anthropology, geology, and local lore. Visitors access the cave through a portal that emphasizes the transition into the subterranean landscape.
The entrance portal to the cave offers a dramatic perspective of the cliffside, and the exterior Megalithic Park provides clear views of the surrounding Basque mountains.
Bring a light jacket as the cave interior remains cool even in the middle of summer.
Wear shoes with good grip, as the paths can be slippery due to natural moisture.
Plan to spend time in the exterior Megalithic Park after your guided tour, as it is included in the visit.
Do not attempt to explore the cave system without an official guide, as many areas are restricted for safety and preservation.
Closed annually for a period in winter; generally operates from spring through early autumn.
Photography is strictly prohibited inside the cave chambers to protect the environment and preserve safety. Touching the stalactites and stalagmites is forbidden.
