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
International University in Geneva institutions". IUG counts 270 students. The International University in Geneva offers undergraduate and graduate programs such as bachelor's and master's degrees in several disciplines, including international relations, media and communications, computer science, business administration, international management, and international trade. A Doctorate in Business Administration and Public Administration jointly offered with Plymouth University is also available. The International University in Geneva has both institutional accreditation and program accreditation. The International University in Geneva is accredited by the British Accreditation Council (BAC) as an Independent Higher Education Institution. The British Accreditation Council (BAC) is referenced with the European Quality Assurance Register for