Lake Geneva, known as Lake Lehmann in France, is the largest of the Alps. The lake covers an area of about 224 square miles, 140 square miles in Switzerland and 84 square miles in France. Lake Geneva was formed by the Rona Glacier. The lake is arched and its concave point faces south. After the dissolution of the Rona Glacier, the Rona River is formed, which is the main river of Lake Geneva in Turna. Lake Geneva is 1,230 feet above sea level and 46 miles long. The widest part of the lake is 8.5 miles. The deepest part of the lake is 1017 feet. The lakeside and adjacent areas have a mild climate and little temperature variation, and many scenic spots have been built. Lake Geneva is the world's largest mountain barrier lake. There are many white swans swimming in the water near the wharf in the lake. They are very beautiful.