The entrance, 0.4x0.7 metres, gives way to a passage of reduced dimensions which, after a step, leads to a first chamber 7x7 metres with an irregular ceiling. A crawlway situated in the N side of the chamber allows access to the main gallery, about 30 metres long and with a width that oscillates between 6 and 10 metres; the low ceiling in the first third of the gallery gains height after a step, reaching up to 6 metres. The main gallery comes into contact with two orthogonal joints, one situated halfway along the gallery and reached through a narrow passage between blocks; once past this and after overcoming several steps, both descending and ascending, you reach a vertical narrowness that leads to the point of maximum depth of the cavity. The other is found at the W end of the chamber and communicates with the most complex part of the cavity, made up of a network of fissures with a preferential NE-SW and NW-SE direction, often interconnected with each other at different levels.