Chens-sur-LémanChens-sur-Léman is a commune in the Haute-Savoie department in the Auvergne-Rhône-Alpes region in south-eastern France. It is adjacent to the Border of SwitzerlandWWW chens-sur-leman.frWorld Heritage SiteIt is home to one or more prehistoric pile-dwelling settlements that are part of the Prehistoric Pile dwellings around the Alps UNESCO World Heritage Site.