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
Geneva 15.7%. Of the agricultural land, 0.3% is used for growing crops. Of the water in the municipality, 0.2% is composed of lakes and 2.9% is rivers and streams. The altitude of Geneva is , and corresponds to the altitude of the largest of the Pierres du Niton, two large rocks emerging from the lake which date from the last ice age. This rock was chosen by General Guillaume Henri Dufour as the reference point for surveying in Switzerland. The second main river of Geneva is the Arve, which flows into the Rhône just west of the city centre. Mont Blanc