At the base of a small cliff where there is a pile of blocks, there is a small descending mouth with the floor occupied by blocks that, after about 5 metres, leads to a wider gallery about 12 metres long and a little more than one metre high, with a very flat ceiling and a floor with only small rubble. On reaching the end we can stand up, where we see an accumulation of larger blocks and from where a narrow gallery emerges in an E direction that is choked. The vertical drop is 3.6 metres with a route of 28 metres.

The cave constitutes an important example of an intermittent spring. Although it seems clear that the catchment basin would be the plana dels Motllats, its operating regime is not sufficiently studied, with little data available. In one of the emissions it has been verified how that large flow of water dried up in less than a week, leaving only water accumulated in the main gallery.

On 7/12/14 the water temperature was 9.5º C while the ambient was 5.5ºC at 5 metres from the entrance on a cold day with outside temperatures of just over one degree.