Geneva the south-western end of Lake Geneva, where the Rhône flows out. It is surrounded by three mountain chains, each belonging to the Jura: the Jura main range lies north-westward, the Vuache southward, and the Salève south-eastward. The city covers an area of , while the area of the canton is , including the two small exclaves of Céligny in Vaud. The part of the lake that is attached to Geneva has an area of and is sometimes referred to as "petit lac" (small lake). The canton has only a border with the rest of Switzerland. Of of border, 103 are
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