Avenc de la Penya

Vallirana, in the Pèlec urbanisation (also called Pèlac, Pèlag and even Pèlach), located at the junction of Avinguda d'Olesa de Bonesvalls with Carrer Galicia; we will head to a vacant lot next to house no. 10 on Avinguda d'Olesa de Bonesvalls. Once in the vacant lot we will go down the left-hand side along a wooded slope with remains of construction material; at the bottom of the slope we will find a path that leads towards the rear of the houses, and we will follow it for about fifty metres. At this point, on the left-hand side facing the ravine, the upper part of a rock can be seen half-hidden by the vegetation; we will have to go down either side of the rock to its base, where we will find the mouth of the cavity at the foot of the crag formed by the rock.