The 4 x 2 metre entrance has the S lip sunk 2.5 metres in relation to the upper one. The first pit reaches the level – 31, divided by a wide section into two stretches of 13.5 and 17.6 metres.

The whole cavity is rigidly structured on fractures without any kind of modification by excavation phenomena. The clastic morphology dominates deeply over a set of joints, creating ledges and false floors at different heights. The progression in depth is halted by the progressive closing between the walls of the fractures, which together with the external topographical conditions allow the pit to be classified as a gravitational tectogenetic detachment cavity.

From the base of the entrance pit the progression towards the SW leads us, by means of a ramp, to the first drop of 4.4 metres following the slope covered by blocks down to – 50 metres, where the stalagmitic concretion imposes a narrow access to the 15.8 metre pit that puts an end to this route at 66 metres of depth.

Again at the base of the entrance pit (- 31) and continuing towards the NE, we descend a drop of 3.5 metres followed by a slope and a second drop of 3.3 metres, which need not be descended, since following at mid-height along the left cornice and making an acrobatic step above the pit, in a concreted stretch with a beautiful stalagmite standing out, one arrives at a jamming of blocks and concretions that form a false floor through which one accesses the 29 metre pit. The descent is carried out initially touching a highly crystallized wall and in the air the last stretch, reaching the level – 64.5. From here a steep slope with large blocks, both on the floor and wedged at mid-height, leads to the level – 72, where a new drop of 2 metres leads to a narrow crawlway that descends 3.7 metres. Another passage between blocks and a new drop of 2 metres leads us to a pit of 8.5 metres (at the bottom: level – 88.5), at the base of which, the clasts of parietal and zenital origin, as well as the large fractured stalagmitic masses, give rise to a gallery of chaotic appearance in which the last pit of the cavity opens, of 21 metres, all presenting different ledges due to the jamming of blocks.

Despite everything, infiltrations are relatively frequent and we can consider them responsible for the intense parietal coating that can be seen down to the level – 50 and for the notable stalagmitic fragments scattered throughout the rest of the cavity.

From the base of the entrance pit the progression towards the SW leads us, by means of a ramp, to the first drop of 4.4 metres following the slope covered by blocks down to – 50 metres, where the stalagmitic concretion imposes a narrow access to the 15.8 metre pit that puts an end to this route at 66 metres of depth.

Again at the base of the entrance pit (- 31) and continuing towards the NE, we descend a drop of 3.5 metres followed by a slope and a second drop of 3.3 metres, which need not be descended, since following at mid-height along the left cornice and making an acrobatic step above the pit, in a concreted stretch with a beautiful stalagmite standing out, one arrives at a jamming of blocks and concretions that form a false floor through which one accesses the 29 metre pit. The descent is carried out initially touching a highly crystallized wall and in the air the last stretch, reaching the level – 64.5. From here a steep slope with large blocks, both on the floor and wedged at mid-height, leads to the level – 72, where a new drop of 2 metres leads to a narrow crawlway that descends 3.7 metres. Another passage between blocks and a new drop of 2 metres leads us to a pit of 8.5 metres (at the bottom: level – 88.5), at the base of which, the clasts of parietal and zenital origin, as well as the large fractured stalagmitic masses, give rise to a gallery of chaotic appearance in which the last pit of the cavity opens, of 21 metres, all presenting different ledges due to the jamming of blocks.