Grotte di Olèrdola

Olèrdola, a municipality in Alt Penedès, has 9 inventoried cavities: 3 pits and 6 caves. Together they total 93 metres of passage and reach a maximum depth of 11 metres. All the known cavities develop in limestone.

Among the most notable is the Avenc de Can Castellví, with 17 metres of passage and 11 metres of depth, an entrance of 40X30 cm and a shaft of -8 metres. The Cova de la Muntanyeta, 14 metres, is a rock shelter 22 metres wide known since time immemorial. Other cavities are the Avenc d'Olèrdola, a little over 6 metres deep, and the Coves de la Vall, a group of shelters and small hollows of archaeological and troglodytic interest.

Also found there are the Avenc de Viladellops, 3.5 metres deep, the Cova de Segarulls, with cave paintings discovered by Pere Giró at the end of July 1958, and the Covetes de Viladellops, a group of three tiny caves.