Lake Pergusa is a Special Nature Reserve of Community Importance, identified as a Special Protection Area and Site of Importance under the EEC Directives 79/409 e 92/43, necessary to safeguard the Pergusa basin and related flora and fauna presences. The lake is located in the center of Sicily, in the province of Enna, a m 667 s.l.m., It has a perimeter of about 4,5 km and is surrounded, the 50s, by a National famous racetrack. The lake is an area and a habitat of high social interest and natural beauty. Under the ornithological, It is a key location in the migratory movement of many species as well as habitat for wintering and nesting. Unique lake Endorheic (no tributaries or emissaries) Sicily, It is characterized by large oscillations of level, related to rainfall and evaporation especially summer regime. It 'also known for brackish waters and the charming “RED WATER” (the water flushing) manifested, under certain conditions, for the presence of anaerobic photosynthetic solfobatteri.