Small cave at Coll d'Ases (Gallifa). From Castellterçol we will follow the BV-1245 road towards Granera; after kilometre 2 we will turn left onto the paved track towards Coll d'Ases and Gallifa. After about 7 kilometres we will reach Coll d'Ases; on the right-hand side and next to the traffic signs a path starts, which we will follow until we find an iron pole where the path splits. We will keep left, which will take us to the base of the cliff where we will find some cairns; shortly after we will find the first of the caves a little more than 250 metres from Coll d'Ases. A few metres further on we will find the rock shelter and then the entrances of the cova Central; we continue onwards, where the cliff turns right and then immediately resumes the previous direction, and 22 metres from the last entrance of the cova Central we find the cova Petita.