Peñas de Ranero

Limestone rock that has been molded by the action of rain giving rise to one of the most impressive karst topology. Locked up in its interior are underground treasures, like the Caves of Pozalagua and the Caves of Santa Isabel..
The Cave of Pozalagua you can observe the greatest “eccentric stalactite” concentration in the world. Located near the Torca of the Carlis with the the greatest cavity of a cave in Europe and second largest in the world. Capable in it´s interior of hold the whole building of the Guggenhiem museum of Bilbao. Next to the District of Ranero the caves of Santa Isabel has an important paleontological deposit and is inhabitated by large collony of bats.