Gangkhar Puensum in Bhutan rises about 7,570 metres and has never been summited. The country banned climbing on peaks above 6,000 metres out of respect for local beliefs.

A few teams tried in the 1980s before the ban and were turned back by weather and confusing maps. It may stay unclimbed for a very long time, which suits many people just fine.

Why it is in the vault: it is the kind of find worth coming back to. Add sources, corrections and related links in the discussion thread.