Grotte di Vacarisses

Vacarisses, a municipality in the Vallès Occidental, has 15 catalogued cavities: 8 pits and 7 caves. Together they total 367 metres of passage and reach a maximum depth of 36 metres. The dominant lithologies are conglomerates, present in 13 cavities, with one travertine and one sandstone.

The longest cavity is the Avenc de la Canal de Mura, at 100 metres, which is also the deepest, with 36 metres of depth in the Serra l'Obac; it has an entrance of 1 x 0.5 metres, shafts, chimneys and galleries, was mentioned in 1935 and explored in 1961 and 1980, and hosts cave fauna. It is followed by la Saiola, a temporary spring of 63 metres, and the Cova de la Canal del Solitari, of 29 metres, discovered in April 1973 by two members of the SIS of the Centre Excursionista de Terrassa.

Other notable cavities are the Forat dels Despistats, of 25 metres, and the Cova dels Lladres, of 20 metres, a Neolithic Epicardial burial cave known since remote times. Among the deepest are the Avenc de Rosseguers, of 12 metres, the Avenc d'Alzina Teresa and the Escletxa del Paller de Tot l'any, both of 7 metres.