Grotte di Monistrol de Calders

Monistrol de Calders, in the Moianès, has 8 catalogued cavities, all of them caves or rock shelters. Together they total 94 m of passage and reach a maximum depth of 5 m. Cova dels Bucs is the longest cavity, at 25 m, and also the deepest, at 5 m; it is an old fossil conduit hanging at three levels, explored and catalogued in January 2020, 25 m long with a vertical extent of +5.5 m.

Among the cavities, notable ones include Bauma de la Coma, of large dimensions, 76 m wide, 22 m deep and 10 m maximum height; Cova I Balma de l'Ermità, with remains of dry-stone walls; Balma Freda, beside the bed of the torrent de l'Om, known since remote times and catalogued in January 2018; and Bauma de la Baga Cerdana, on the riera de l'Om, 70 metres wide, 7 high and 10 deep. As for lithology, 7 cavities develop in sandstones and 1 in conglomerates.