The mouth opens in the cliff wall in the form of a cave; the floor already slopes downwards from the entrance. Just past the mouth, in the ceiling we find an ascending pit of about 4 metres that leads to the outside on the crag wall, but the exit is very narrow and does not allow passage.

Following the ramp downwards we reach a small step and a narrow passage, which gives access to the -21 metre pit. Once at the base of the pit, at the W end we find a narrow passage that leads to a small pit of about 5 metres, which for the moment is the end point of the cavity. The base of the pit is filled with material from the most recent digging.

Both the depth, 34 metres (-30.5/+3.5), and the length of the cavity, 43 metres, are quite approximate.

The first explorers had to dig through twice following the ramp downwards; the narrow passage that gives access to the -21 metre pit also had to be dug through. The -21 metre pit is quite comfortable if rigged with assistance from a rock bridge; then it has no rub points. At the base of the pit, at the W end, a narrow passage, also dug through, leads to a small pit of about 5 metres, which for the moment is the end point of the cavity; in this place a slight draught is felt through a narrow fissure.

Along the whole stretch of the downward ramp and narrow passage we keep finding remains of the material used in the first explorations and diggings; the state of this material (ropes, timbers, maillons, hangers, etc.) is quite deteriorated, except for a bundle of timbers that retains its original wrapping. At the bottom of the -21 metre pit we find a wooden structure in the form of a cupboard made to hold stones, while at the same time we find a wooden platform secured with handrails that served to stop falling stones. Currently (2023) most of the timbers of this structure are beginning to rot, with the consequent risk of everything coming down.