Caves of Santa Maria de Besora

Santa Maria de Besora, a municipality in Osona, contains 30 cavities: 16 pits and 14 caves. Together they total 989 m of passage and reach a maximum depth of 52 m. The recorded lithologies are marls (22), sandstones (7) and travertines (1).

Bufador Nº8 de Beví is the longest cavity, at 400 m, and also the deepest, at 52 m; it has 6 entrances and a complex route between galleries and shafts. Bufador Nº3 de Beví, with 5 entrances and a depth of 18 m, lies between the main fissure and the N lateral branch. Avenc del Fang, 29 m deep, has an entrance shaft in a doline and descending galleries.

Other notable cavities are Bufador Nº16 de Beví, with 52 m of passage, two entrances joined by a small shaft and a drop of -9 m, and Forat de les Tombes, with 45 m of passage, known since time immemorial and explored and surveyed in 1973 and 1977. Avenc d'en Moni, 10 m deep, was explored on 18 September 1977.