Gangkhar Puensum lies on the border of Bhutan and Tibet, although the exact boundary line is disputed.
Chinese maps put the peak squarely on the border whereas other sources put it wholly in Bhutan.
When the mountain was first mapped and surveyed in 1922, maps of the region were shockingly inaccurate.
Until very recently, maps of the region showed the mountain at different locations and marked with different heights.
When Bhutan finally opened its doors to mountaineering, a series of expeditions were organized.
Between 1985 and 1986, four attempts were made, but all ended in failure.
The decision to allow mountaineering as a commercial pursuit didnt last long.
But a longstanding border dispute with Bhutan, finally caused the permit to be revoked.
Notes taken by the team suggested that the expedition to the main summit would have been successful if allowed.
The location of Gangkhar Puensum shown by the marker A on the Bhutan-Tibet border.
Gangkhar Puensum from Ura valley, Bhutan.Photo credit
The approach to Gangkhar Puensum.Photo credit
Sources:Wikipedia/About.com/ABC of Mountaineering/Basement Geographer
