Gangkhar Puensum (གངས་དཀར་སྤུན་གསུམ་, Kangkar Punsum, Gangkar Punsum, Gankar Punzum) Gangkhar Puensum is a towering 7,570-meter (24,835-foot) mountain in the eastern Himalayas along the remote frontier between Bhutan and Tibet. Widely recognized as Bhutan’s highest mountain and the highest unclimbed independent mountain on Earth, it occupies an unusual place in mountaineering history: several expeditions attempted it …