Small cave of 17 m. on Ros hill.
Formed by a single gallery slightly descending and about 12 meters long. There are small derivations of very short distance. The dimensions are small and with some narrow steps.
Known since ancient times, although the first news dates back to 1973 when it was explored by members of the then delegation of the SIS - CET in Olesa de Montserrat. An attempt to clear it led to the discovery of the first flint knives. The subsequent excavation resulted in the description of 76 pieces, basically of lithic materials.
It is at the foot of an inclined plate without many points of support, except for a sable, where an arrow indicates the climb to reach the Cova de les Tres Boques. It's not difficult but you have to be careful, especially if it's wet and more on the way down.