Nowhere else in the world will you find the same concentration of high summits. They consist of gigantic granite monoliths standing upright, in the shape of vertiginous walls ending in sharply pointed tips, 3,300 feet above the valleys. As part of the Karakorum chain, a grandiose corrie gathers 4 of the 14 peaks over 26,250 feet high: the K2 (28,250 feet, second highest peak in the world), Broad Peak (26,400 feet), Gasherbrum I (26,460 feet) and Gasherbrum II (26,350 feet). In the south, the impressive Nanga Parbat, last bastion of the Himalayas, towers at an altitude of 26,650 feet. To this list should be added the 68 peaks over 22,960 feet high (among which Tirich Mir, at 25,280 feet, in the Hindu Kush) and hundreds of summits higher than 19,680 feet.