Pergusa Lake is a brackish lake enclosed by Erei Mounts. It is an area of great natural importance, rich in biodiversity, especially of birds, as it is the only wetland Park in the heart of Sicily for migratory birds. Lake is surrounded by a band of lagoon vegetation, home to several species of rattan species. Park Management has provided the creation of paths and parking areas for visitors, with huts for wildlife observation and observation of natural environment. In the hilly part of the reserve, it is also a Teaching Laboratory operated by Environmental Education Center "Alexander Von Humboldt".