The Rhône is one of the major rivers of Europe, rising in Switzerland, passing through Lake Geneva and running through southeastern France. At Arles, near its mouth on the Mediterranean Sea, the river divides into two branches, known as the Great Rhône (French: Grand Rhône) and the Little Rhône (Petit Rhône). The resulting delta constitutes the Camargue region.
The Arve river flows for approximately 100 km (62 miles) through France, in the département of Haute-Savoie, and (for a few kilometers) in Switzerland. It is a left tributary of the Rhône. Rising in the Graian Alps, close to the Swiss border, it receives water from the many glaciers of the Chamonix valley (mainly the Mer de Glace) before flowing north-west into the Rhône on the west side of Geneva, where its much higher level of silt brings forth a striking contrast between the two rivers. The Arve flows through Chamonix, Sallanches, Cluses, Bonneville, Annemasse and Geneva.