The entrance is 10X4 metres and gives access to a pit 35 metres deep, keeping the same dimensions down to -10 metres; from this point it opens about 10 metres more towards the NE, giving rise to a chamber of regular dimensions. From the base of the pit, towards the NE a steep slope leads to the head of a 15-metre pit, with plenty of mud and a rather precarious rigging. At the base, after a small step, -63 metres is reached. There is a small upper gallery parallel to this last section that ends through a window into the 15-metre pit. Back at the base of the entrance pit, if we follow towards the NW, after climbing a small step where a thick trunk rests as a bridge, we find a 15-metre-deep pit with an elliptical section, with a lot of mud on the walls and a rigging without deviations that produce a rather worrying rubbing of the rope. After passing a crawl we continue along a flat gallery that is flooded for a few metres, then it becomes a steep ascending slope that ends at -40 metres at the base of a chimney of indeterminate height. Halfway up the slope there is another chimney which we do not know whether it has been explored.

The base of the 15-metre-deep pit with an elliptical section, at some times, is a large pool of water. After passing a crawl, a flat gallery is flooded for a few metres.

The first exploration was carried out by the SAS of the CGB on 16 January 1966.