Megaliths of Pla dels Forcs Curiosity · Sant Iscle de Vallalta, Maresme, Barcelona Image of Sant Iscle de Vallalta, not of the place itself. The rock known as Pedra de les Olles is found at Pla dels Forcs, at the confluence of the municipalities of Vallgorguina, Arenys de Munt and Sant Iscle de Vallalta, in the Maresme; it is reached from Sant Iscle de Vallalta by a path that climbs past les Dones d'Aigua and Can Maresme. Roughly triangular in plan, it has a large central basin 40 centimetres in diameter and 6 deep, surrounded by a total of 25 carved cup-marks joined by channels. It is attributed to the middle or final Neolithic and to the Chalcolithic. It was documented in the 2008 survey carried out to revise the archaeological record of the Maresme, and it appears in the Inventory of the Archaeological and Palaeontological Heritage of Catalonia. Photo: Alberto-g-rovi (CC BY-SA 3.0) What to see and do in Sant Iscle de Vallalta