At the Serrat de la Morella (Garraf). Go up the road that leads from the Campgràs to the radio installations, specifically to the one at elevation 591 (where the building with the “ball” is). At the last left-hand bend, before reaching the access gate, go to the right in a NE direction, and a few metres below the ridge, in a slightly hollowed spot, is the entrance of the Avenc del Perpal. From here, only 19 metres away in direction N25E, is the Avenc Xic.