Nathula Pass was a major passage between India and Tibet before it was closed in 1962. Located at an altitude of 14,450 ft, the road to Nathula passes through Tsomgo Lake. It is one of the highest motorable roads in the world and is richly surrounded by alpine flora. On a clear day you can even see the road winding down the Chumbi valley. Tourists are allowed to go close to the international border from where you can see Chinese soldiers on the other side of the barbed wire.