Located in the town of Dima, in the province of Biscay, the Baltzola Caves and natural bridges form a unique natural attraction in the Basque Country. This geological wonder is nestled within a lush, mountainous landscape, offering visitors an experience that combines nature, history, and mythology.

The Baltzola Caves are part of a limestone karst formation that has been shaped over millennia by water erosion. These caves have historically been used by humans since prehistoric times, as evidenced by the archaeological remains found in the area, including tools and carvings. The caves were likely used as shelters or ceremonial spaces, adding a layer of historical significance to their natural beauty.

Adjacent to the caves is the Jentilzubi, a natural stone bridge formed by the collapse of a cave roof. The name translates to “Bridge of the Gentiles” and is tied to Basque mythology. According to legend, the jentilak—a race of giants from Basque folklore—once roamed the region and used the bridge. Very close to the caves, the Abaro tunnel offers a very easy opportunity to venture into the heart of the mountain.

Admiring the Baltzola cave, Jentilzubi and Abaro tunnel requires a short walk from the Baltzola Parking, located in the Indusi neighborhood of Dima. Its an easy route, but proper mountain footwear is recommended.