Caves and Potholes of Sant Llorenç del Munt Nature · Vacarisses, Vallès Occidental, Barcelona Image of Vacarisses, not of the place itself. The caves and potholes of Sant Llorenç del Munt form a karst system with more than three hundred documented cavities, one of the most important in central Catalonia. Among them stand out the Cova del Frare and the Cova Simanya, where ceramic fragments and other remains have been found from the early and late Neolithic, the Chalcolithic, the Bronze Age, the Iberian period and the Middle Ages. Very close to the second cave, at the coll d'Eres, four cist graves were found, identified as Visigothic thanks to a bronze fibula found inside. Photo: Pere López Brosa (CC BY-SA 4.0) What to see and do in Vacarisses