The entrance measures 7 by 2 metres and is surrounded in one corner by abundant vegetation, such as ivy and holm oaks, on one of which it was customary to tie the rope to carry out the descent. The entrance shaft is about 45 metres deep in a direct vertical, although at 18 metres there is a large stone wedged between the walls, which makes a second anchor necessary to continue the descent. A little below this block there is a small ledge with room for two people. The next 27 vertical metres are almost entirely airy until reaching the bottom of a spacious chamber 15 metres long and between 2 and 5 metres wide. At the SE end, where we find a large rock jutting out in a pointed shape, a fairly steep corridor descends at a right angle towards a step. At the foot of this, another sloping passage brings us towards a second step higher than the previous one. With a portal 6 metres wide and 3 high, one of the largest underground wings of the massif is presented to us, 20 metres long and 12 metres wide. The floor is steeply sloping towards the opposite end from which we enter, finding a slight step right at the beginning of our entry. At both lower ends of the chamber there are respective steps that communicate through a lower corridor; the point where the maximum depth of the cavity is reached (level – 84). On the SE side of the chamber there is a fairly cramped gallery between mud and stones that, after a couple of turns, ends filled with sediments. At the opposite end and next to the step that leads to the lower gallery, we find the entrance to two rooms, the first through a large block leads us to a small room; the second is formed by an elongated passage at the end of which, through a narrow passage, it continues for about 10 metres making a couple of angles that are sometimes difficult to overcome.

The descent was carried out by tying the rope to a holm oak. The entrance shaft makes a second anchor necessary at 18 metres to continue the descent. Formerly, the small ledge located below the block was used to make a second installation of the elektron ladder (currently few people use this ledge). The step in the corridor can be avoided by passing through a crawlway that starts on our right. The second step, higher than the previous one, can also be avoided on its left side by making a couple of little jumps between a pile of large untidy blocks, thus reaching the final chamber.