This is the Kunlun Pass of Tibet Railway in Qinghai province, China. A Lhasa-bound train tops the 4,767m Kunlun Pass, one of the highest points on the Lhasa railway.The metal poles on the side of the track conduct heat from the permafrost in a bid to ensure the soil remains frozen all year round. Reaching 5,072m above sea level, the railway is the world's highest..08 Jul 2006