Deepest caves and potholes in the Basque Country
The deepest cave in the Basque Country in the EspeleoWorld catalogue is Gazteluko Urzuloa (522 m), followed by Arbeloko leizea 1 and Marikutxako leizea 3.
The deepest cave in the Basque Country in the EspeleoWorld catalogue is Gazteluko Urzuloa (522 m), followed by Arbeloko leizea 1 and Marikutxako leizea 3.