Lake Annecy Lake Annecy Lake Annecy (French: "Lac d'Annecy") is a perialpine lake in Haute-Savoie in France. It is the third largest lake in France, after the Lac du Bourget and Lac de Grand-Lieu, if the French part of Lake Geneva (which is shared between Switzerland and France) is excluded. It is known as "Europe's cleanest lake" because of strict environmental regulations introduced in the 1960s. It is a popular tourist destination known for its swimming and water sports. The lake was formed about 18,000 years ago, at the time the large alpine glaciers melted. It is fed by many small rivers
Lake Geneva than in Geneva. In 563, according to the writings of Gregory of Tours and Marius Aventicensis, a tsunami wave swept along the lake, destroying the fort of Tauredunum and other settlements, and causing numerous deaths in Geneva. Simulations indicate that the Tauredunum event was most likely caused by a massive landslide near the Rhône delta, which caused a wave eight meters high to reach Geneva within 70 minutes. In 888 the town was part of the new Kingdom of Burgundy, and, with it, was absorbed into the Holy Roman Empire in 1033. In the late 1960s, pollution made it dangerous