Grotte di Sant Esteve de la Sarga

Sant Esteve de la Sarga, a municipality in Pallars Jussà, brings together 46 catalogued cavities: 24 pits and 22 caves. Together they total 5538 m of passage and reach a maximum depth of 166 m. The lithologies represented are sandstones (7), limestones (38) and travertines (1).

Among the most notable cavities are the Grallera Gran del Corralot, with 1977 m of passage and 166 m of depth, and the Graller del Boixeguer, with 870 m and 148 m of depth, both in the Montsec d'Ares. Other significant cavities are the Cova Colomera, with 475 m of passage and 78 m of vertical drop in the Montrebei gorge; the Cova del Brugal, with 279 m of passage and 44 m of depth, known since olden times and explored since 1958; the Grallera de Corona, with 272 m and 119 m of depth; and the Grallera d'Alsamora, with 98 m of vertical drop, an entrance of 30 X 5 metres and a shaft 69 m deep.