Doi Ian Doi Ian Doi Ian () is a mountain in Thailand, part of the Phi Pan Nam Range, at the southeastern end of Chiang Rai Province limit near the point where the limit of this province meets with the northern end of Phayao Province, nine km from the border with Laos. This mountain rises in Ngao Subdistrict, Thoeng District. Its summit is 12 km east of Thoeng, near Ngao east of the road going from it to Wiang Kaen town. With a height of 1,174 metres Doi Ian is a conspicuous mountain in the surrounding landscape that can be seen from
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