India is building the highest bridge in world
The highest bridge in the world is under construction in India over the Chenab river in Reasi district of Jammu and Kashmir. This is a road and railway bridge, which on completion will be 1,315 mt long, and 359 m above the river Chenab.
This should have been completed by now but because of various obstruction and its cancellation one time due to fear over its stability and safety, it is still under construction, but once completed it will be world's highest rail bridge. Here is a video talking about the specification of bridge.