It is an artificial lake that extends over 367 hectares. Created in the second half of the nineteenth century by building a dam to facilitate timber floating to Paris. Every decade, the lake is emptied and some of the buildings that were submerged since its creation are visible. Today it is mainly a leisure place not far from Paris, and provides very complete facilities for tourists: water sports, restaurants, campgrounds, etc. ... For me this lake is really beautiful and it's a very nice to go on small hikes.