Caves of Castellar del Vallès

Castellar del Vallès, a municipality in the Vallès Occidental, brings together 43 inventoried cavities: 34 pits and 9 caves. Together they total 1134 m of passage and a maximum depth of 80 m. Conglomerates predominate (34 cavities), followed by limestones (8) and travertines (1).

The Avenc de la Carbonera, in Sant Llorenç del Munt, is the longest cavity (170 m) and the deepest (80 m); it was discovered in 1966 by a charcoal burner from Castellar del Vallès. Other notable pits are the Avenc de l'Aladernar (65 m of passage and 32 m of depth, fully explored on 30 March 1986), the Avenc de les Dues Boques (65 m, discovered around 1972 and explored on 6 January 1973), the Avenc dels Talps (60 m, discovered and explored in May 1964) and the Avenc del Muronell (55 m of passage and 35 m of depth, on the NE slope of the turó del Muronell).

Among the maximum depths are also the Avenc d'Aguilar (32 m, with an entrance of 13x3 m and opened by an N45O-S45E joint) and the Avenc de l'Obaga de l'illa (24 m, on the northern slope of the Carena de l'Illa, above the torrent de Matalonga).