Grotte della Garraf

The Garraf is a region with 192 recorded cavities: 125 pits and 67 caves. Together they total 6,101 m of passage and reach a maximum depth of 193 m. The dominant lithologies are limestones (185 cavities), followed by dolomites (5), travertines (1) and conglomerates (1).

Among the longest cavities are la Falconera, with 600 m, the main spring of the Garraf massif, known since ancient times and explored both speleologically and underwater since 1899; the Forat de la Ruda, with 450 m, and the Avenc Benjamí-digón, with 240 m. As for depth, the Forat de la Ruda reaches 193 m, followed by the Avenc Leia, with 110 m, and the Avenc del Vallaric, with 103 m.

Other notable cavities are the Avenc Leia, discovered in December 2016 by the GES-Garraf and made known in 2018, and the Avenc dels Arítjols, with 92 m of depth and an 80 m shaft discovered in 2014 by the GREC. The Avenc Benjamí-digón, in the Campgràs area, Sitges, was located in 1969, and the Avenc del Vallaric has an entrance shaft of 52 m and a vertical passage down to the -103 level.