Due to strict environmental management measures implemented in the 1960s, Lake Annecy is known as the clearest lake in Europe. Lake Annecy has become a popular tourist destination for its famous water recreation activities. Lake Annecy was formed 18,000 years ago during the melting of the Alps glaciers. Many small rivers originating from the surrounding mountains flow into Lake Annecy for more than ten kilometers, providing sufficient water for Lake Annecy. Strolling and cycling along the shore of Lake Annecy, or swimming and boating in the lake, overlooking the rolling Alps in the distance, is undoubtedly a great pleasure in life. French Enlightenment thinker Rousseau once spent the "best 12 years" of his life in Annecy.