Doi Tung Doi Tung Doi Tung (ดอยตุง) is a mountain in the Thai highlands of Chiang Rai Province, Thailand. While not the highest elevation of the province, the 1,389 m high Doi Tung rises steeply close to the Thailand-Myanmar border. It is the highest point of the Doi Nang Non, a subrange of the Daen Lao Range, in the area known as "Golden Triangle". Most of the bedrock of the mountain is limestone and granite. The vegetation below 1,000 m is mostly deciduous forest, and the vegetation above this height is evergreen. The population of Doi Tung is about 11,000 people, consisting
Highest unclimbed mountain had only one summit attempt back in 1957 when climbers came within of the summit; Nepal then banned future attempts. The mountain most widely claimed to be the highest unclimbed mountain in the world in terms of elevation is Gangkhar Puensum (). It is in Bhutan, on or near the border with China. In Bhutan, the climbing of mountains higher than has been prohibited since 1994. The rationale for this prohibition is based on local customs that consider this and similar peaks to be the sacred homes of protective deities and spirits, and the lack of high-altitude rescue resources from