Small cave about 25 m long. Through the narrow entrance one enters a first small chamber (Sala Morta), the one with the highest ceiling in the cavity. At the far end and to the right of this chamber, a narrow passage at floor level opens into a second small chamber (Sala de la Mola), elongated in shape, much lower and with the whole floor covered in clay sediments. Almost at the end and on the left-hand side, after passing another narrow passage, one reaches a third and last small chamber (Sala de les Mil i Una).

An ancient spring, today completely fossilized, with three outlet mouths, although it is only possible to enter this small cavity through one of them.

The first small chamber (Sala Morta) is heavily decorated and a stalagmitic flowstone stands out at the front. The third and last small chamber (Sala de les Mil i Una) is also heavily decorated.

Through the narrow entrance one enters the first small chamber. At the far end and to the right of this chamber, a narrow passage at floor level opens into the second small chamber. Almost at the end and on the left-hand side, after passing another narrow passage, one reaches the third and last small chamber.

It is excavated in Holocene travertines, very thick and dated at 11000 years, which cover the puddingstones that, being harder, condition the steps.