Lake Perrin is an artificial lake situated below the Rock of Roquebrune. The site used to be a sand quarry and was exploited for about forty years before being filled with water.
Covering approximately 30 hectares, the lake is fed by the waters of the Argens River.
It is of significant ecological importance:
its western section, covered with reed beds, provides natural shelter for nesting birds and serves as a spawning ground for fish;
its compact sandy banks offer an ideal habitat for the European bee-eater, which digs its nesting burrows there;
numerous bird species have been recorded around the lake, including the Grey Heron.
Following the flooding of the former quarry, a swimming beach and a watersports centre were developed. Visitors can enjoy a variety of recreational activities, including kayaking, stand-up paddleboarding, and pedal boating.