Roques del Vallès (Gallifa Area) Nature · Gallifa, Vallès Occidental, Barcelona Rock formations in the municipality of Gallifa, at the foot of the Sant Llorenç del Munt mountain range, known locally as the cingles de Sant Sadurní de Gallifa. It is a set of cliffs surrounding a hill just over 900 metres high; the erosion of the sandstones and conglomerates that form it has left a landscape of cliffs with rounded boulders, characteristic of the area. Photo: Maria Aulet (CC BY-SA 4.0) What to see and do in Gallifa