Avenc del Pont de Can Prat

With a circular shaft, earthy and with roots from the pine near the mouth, the pit descends vertically 3.5 metres. At its base, an opening in the shape of a half-moon allows a fairly comfortable passage for a first pitch. This half-moon is delimited by a large slab of stone that crosses the whole side of the base and that seems firm enough. Next a slab of smaller dimensions that protrudes from the wall is the only one that gets in the way in this initial passage of the interior pit. A shaft of 3 metres leaves you at the base. At this base there is a cavity that fills up at half a metre of depth, and a crawl of steep inclination, some 55º and 4.5 metres of route that ends in a small chamber, where the point of maximum depth is reached at 15.5 metres.

Special mention must be made that this cavity is one of the few that are found excavated in limestones within the Sant Llorenç del Munt – Serra de l'Obac conglomerate massif. Years ago the pits of Can Sallent and that of les Pedres, also excavated in limestones, disappeared due to the advance of the quarry. Now there are only this one, a fissure in the area of Roques Blanques and some other phenomenon of very small dimensions.