Lake Geneva is divided into three parts because of its different forms of formation (sedimentation, tectonic folding, glacial erosion): According to the Swiss Federal Office of Topography, swisstopo, "Lac de Genève" designates that part of the "Petit Lac", which lies within the cantonal borders of Geneva (excluding the cantonal exclave Céligny), so about from Versoix–Hermance to the Rhône outflow in Geneva. The Chablais Alps border is its southern shore, the western Bernese Alps lie over its eastern side. The high summits of Grand Combin and Mont Blanc are visible from some places. Compagnie Générale de Navigation sur le lac Léman (CGN) operates
Ticino (river) Ticino (river) The river Ticino (; ; ; French and ; ) is the most important perennial left-bank tributary of the Po. It has given its name to the Swiss canton through which its upper portion flows. The river rises in the Val Bedretto in Switzerland at the frontier between the cantons of Valais and Ticino, is fed by the glaciers of the Alps and later flows through Lake Maggiore, before entering Italy. The Ticino joins the Po a few kilometres downstream (along the Ticino) from Pavia. It is about long. The highest point of the drainage basin is the