Olesa de Bonesvalls is a town in the Alt Penedès county in Catalonia, Spain. It is located in the Garraf natural park, where Montau, with 658m, is the highest mountain. Olesa is a beautiful place; a medieval refugee for travellers (S. XII); a neoclassic church (SXVII), well kept vineyads and dry stone constructions scattered around the town that were used as refugees for shepherds are the most typical elements in Olesa. Olesa is also known for having the deepest caves (avenc) in Spain; "L' avenc de l' esquerra", 206 m, being the deepest. Avinyonet del Penedès and Begues are the closest towns to Olesa, and it is only 30–45 minutes drive from Barcelona.