Grotte di Vallclara

Vallclara, a municipality in the Conca de Barberà, has 8 caves, all developed in conglomerate. Together they total 167 m of passage and reach a maximum depth of 17 m. The Cova del Mas de la Llana, with 105 m of passage and 17 m of depth, is the longest and deepest cavity in the municipality; it is an old spring with ascending galleries, lithogenic formations and a refuge during the Civil War.

Other notable cavities are the Cova de les Hortes, a large rock shelter with remains of constructions; the Cova del Sales, a large rock shelter 53 metres wide with two distinct parts and known since time immemorial; the Cova del Sastre, a worked rock shelter 52 m long, 11 m deep and 4 m high at its maximum; and la Cova, a rock shelter with 10 metres of passage, 15 metres of width and 9 metres of depth. There is also the Foradada dels Avellaners, a small natural tunnel 7 metres long, 1.2 m wide and 0.75 m high, and the Balma d'en Biosca, a long, shallow rock shelter 117 m long, 3.5 m deep and 7 m high at its maximum, with remains of dry-stone side walls.