The Valencian region was one of the first to witness the agricultural revolution at the dawn of the Neolithic (5,500 BCE approximately). Ceramics appeared, like the Cardium pottery in the Mediterranean, and large settlements, like the Cova de l'Or and the Mas d'ls, were populated. Rock art from this period is abundant, especially in places like Valltorta and Pla de Petracos, the latter being a World Heritage Site.