The entrance, 13x3 metres and funnel-shaped, gives way to a ramp full of moss and ivy that leads to a step beside a wedged block. From here we down-climb to the bottom of this first pit which gives onto a ledge above the chamber of what we shall call the second pit, which has 7 metres of drop. Once down this, we find ourselves at the foot of a chamber 8x3 metres, in the ceiling of which two chimneys can be seen. Continuing in an S direction, a gallery of 8 metres leads us to a 2 metre drop, the bottom of which represents the point of maximum penetration of the cavity. A few metres before reaching the final drop there is a chimney that gives onto an ascending gallery of 4 metres.

The pit is opened thanks to a N45O - S45E joint, in which the processes of erosion and corrosion are quite noticeable. It should be noted that the final part of the cavity, where a small chamber is found, has been excavated thanks to the sandstone stratum that can be seen all around it.

On the walls of the second pit important flowstone has formed thanks to the different water inputs that have progressively diminished until the cavity ceased to be completely active, leaving only small drips.

During 2013 we had access to a survey (unpublished until now) made by members of the GES - CMB towards the mid 1970s, during the work on the third volume of the 'Catálogo Espeleológico de la provincia de Barcelona' (which was never published) and which gives a depth noticeably less (-25m).