Fenghuo Mount Tunnel China

The Fenghuo Mount Tunnel is the worlds highest railway tunnel, reaching an elevation of 16,093 feet. The tunnel encases part of the scenic Golmud to Lhasa route, which is a route on the Qinghai Tibet Railway. The train that travels the railway is nicknamed the rocket to the rooftop of the world because 80% of its route is at an elevation above 13,000 feet. To compensate for the lack of oxygen at such an altitude, the train is equipped with two oxygen sources as well as personal oxygen canisters.