The mouth gives access to a small 4-metre pit that places us on a wide ledge. Here a ramp of about 50 degrees with a 13-metre traverse begins, which pours us into a 9-metre vertical, at whose base it places us at the -22 metres level. On the NW side the cavity continues along a ramp and continues through a narrow joint until -35 metres where it becomes impassable due to its narrowness. On the SE side the gallery continues wide, with large blocks that can be passed underneath until reaching a passage between blocks at -31 metres depth. One must descend -9 metres between the blocks to place ourselves again in the gallery. A new passage between blocks places us at the -47 metres level at the start of a -11.5 metre pit at whose base we find a sediment ramp that leads us to the centre of a large joint; on the other side from where we entered, a good part of this joint can be climbed back up. At the base situated at -63 metres, we find a passage between blocks that allows us to descend -3 metres more, ending the cavity at the -66 metres level. In the main gallery, before passing the blocks at the -31 metres level, the joint can be climbed back up to the upper part; here, after passing a narrow passage, there is a pit of about 28 metres that ends at the same final point as the previous access.

Given that the two known surveys of this cavity presented a difference in their depth of 19 metres, we considered it appropriate to make a mouth-to-bottom traverse to check which was the more correct, since the first (SAS, 1969) gave a depth of 67 m and the second (GERS, 1977) instead had a depth of 48 m. On the survey of this one we have recorded the level of the original version and the real one, recalculated from the aforementioned traverse, although to the -63 m level one must add the final small pit between blocks that is not represented.