Grotte di Montblanc

Montblanc, a municipality in the Conca de Barberà, has 33 catalogued cavities: 17 pits and 16 caves. The group totals a length of 2,640 m and reaches a maximum depth of 76 m. The predominant lithologies are limestones, present in 30 cavities, followed by sandstones, in 3.

Among the cavities most notable for their length are the Sistema Arrels-clonc, with 578 m surveyed in the Muntanyes de Prades, and the Avenc Gran de Esquerdes de les - Rojalons Venes, with about 490 m of length and 42 m of depth on the tossal de les Venes. Other relevant cavities are the Cova del Lladre, of 130 m, the Cova del Buldó, of 123 m, and the Avenc del Pi Rodó, of 126 m.

As for depth, the Avenc del Pi Rodó is the deepest, with 76 m, in the valley of the riu Brugent, where the internal length reaches -76.6 m. It is followed by the Avenc del Mussol, of 48 m, and, with 42 m, the Avenc Gran de Esquerdes de les - Rojalons Venes and the Avenc Nº1 de Requí.