Tibetan plateau covering 1.23 million sq km is linked to the south by the 2500km long Himalayas and to the west by the Karakoram. With an average height of 4,000 meters above sea level, Tibet encompasses some of the world’s highest mountains. Mt. Everest (8848m), the world’s highest peak rises abruptly on the Tibet – Nepal border. Four mountains exceed altitudes of 8,000 meters and thirty-eight mountains exceed altitudes of 7,000 meters.