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
Geneva was ranked as the world's fifteenth most important financial centre for competitiveness by the Global Financial Centres Index, fifth in Europe behind London, Zürich, Frankfurt and Luxembourg. A 2009 survey by Mercer found that Geneva has the third-highest quality of life of any city in the world (behind Vienna and Zürich for expatriates; it is narrowly outranked by Zürich). The city has been referred to as the world's most compact metropolis and the "Peace Capital". In 2017, Geneva was ranked as the seventh most expensive city in the world. Geneva was ranked third in purchasing power in a global cities