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
European Cross Country Championships European Cross Country Championships The European Cross Country Championships is an annual international cross country running competition. Organised by the European Athletic Association, it is the area championships for the region and is held in December each year. The championships was inaugurated in 1994 in Alnwick and the venue for the championships changes each year. Unlike the World Championships for the sport, the European Cross Country Championships consists of six races in age categories, with separate senior, under-23, and junior races for both men and women. There are individual and national team medals awarded in each race. In the team