Mendukilo

The cavity consists of three chambers. The first chamber (Artzainzulo/Refugio de Pastores) measures 40 m long by 30 wide, on a steep downward slope. Continuing to the right and descending through a narrow, low passage, one comes out into a wide chamber to the right, and continues through a zone of collapses. To the left continues a beautiful gallery with an abundance of very beautiful concretions; through the chamber initially left, called on the map sala de la Sevillana, one continues to a third gallery (Herensugearen/La Morada del Dragón), with a great abundance of clastic and tectonic processes that form the lowest floor and also the highest zone of the cavity.

The gallery that continues to the left presents an abundance of very beautiful concretions.

From the first chamber one continues to the right descending through a narrow, low passage, exiting into a wide chamber to the right; one proceeds through a zone of collapses and, to the left, along a beautiful gallery with an abundance of concretions. Through the chamber initially left, called on the map sala de la Sevillana, one continues to a third gallery (Herensugearen/La Morada del Dragón).

Visited on a great number of occasions, its access is currently closed by the Government of Navarra as protection of artistic heritage; in 2005 a part of it has been opened for tourist exploitation given its great beauty. The cavity has been used at times as a shelter for shepherds.