Plans are under way to construct the highest airport in the world in Nagqu, Tibet.  Construction is scheduled to start in 2011 at Nagqu about 186 miles from the Tibetan capital of Lhasa. 

The altitude of the airport is approximately 4,436 metres (14,500ft).  The airport will be just 764 metres lower than the Mount Everest base camp on the Chinese side, which is located 5,200 metres above sea level. 

Construction is expected to take three years.