Lac de Chalain is a wonderful place to get away from the fast pace of everyday life. See if any water activities are on offer here, or just enjoy the calm ambiance.
You'll soon learn why this Fontenu body of water is visited by many travelers. If you're searching for other things to keep you busy, Herisson Waterfalls, Plage de Doucier, and La Pergola are in this area as well. They won't take long to get to from Lac de Chalain.