The Reserve, which falls into six municipalities such as Altavilla Milicia, Baucina, Caccamo, Casteldaccia, Trabia and Ventimiglia di Sicilia, is one of the most interesting naturalistic corners of Sicily.
Approximately 4600 hectares of nature reserve dotted with caves, cliffs, peaks, sheer walls, gentle slopes, streams, and archaeological sites. The reliefs of this reserve, together with Monte San Calogero, form the perfect connection between the Madonne de i Monti of Palermo.
The calcareous nature of the rocks formed in the Mesozoic age by sedimentation in a marine environment of medium depth, has led to the occurrence of numerous karst phenomena. This is how the Grotta Mazzamuto, the Grotta Brigli and the Grotta dei Leoni were formed, whose visit is recommended under the guidance of qualified people.