traversing some of the highest terrains in the world, the qinghai-tibet railway, in service since
july 2006, makes the 4,064-kilometer trip from beijing to lhasa in 48 hours. it climbs to an
ear-popping altitude of 5,072 meters above sea level passing through several tunnels that had to be
carved out of frozen soil. it carries a wide range of passengers from businessmen seeking
opportunities in lhasa to pilgrims to the potala palace. they travel together along the "rooftop of
the world." high clouds railway to tibet showcases the magical allure of this breathtaking railway,
including the latest technology used to overcome the harsh conditions like the icy ground and thin air.
