Darjeeling Himalayan Railways (DHR) - inscribed by UNESCO in 1999.
The Darjeeling Himalayan Railway consists of 88.48 kilometres of 2 feet (0.610 metres) gauge track that connects New Jalpaiguri with Darjeeling, passing through Ghoom at an altitude of 2,258 metres.
The innovative design includes six zigzag reverses and three loops with a ruling gradient of 1:31.
Indian Railways has four UNESCO accorded World Heritage Sites namely
Darjeeling Himalayan Railway (1999)
Nilgiri Mountain Railway (2005)
Kalka Shimla Railway (2008)
Chhatrapati Shivaji Terminus, Mumbai (2004)
There are two more in waiting or in the tentative list namely Matheran Light Railway and Kangra Valley Railway.
Nilgiri Mountain Railways (NMR) inscribed in 2005This railway, scaling an elevation of 326 metres to 2,203 metres, represented the latest technology of the time and uses unique rack and pinion traction arrangement to negotiate steep gradient.
Kalka Shimla Railway (KSR) inscribed in 2008
The world’s highest multi-arch gallery bridge and the world’s longest tunnel (at the time of construction) of KSR were the testimony of the brilliance engineering skills applied to make a dream a reality.
Chhatrapati Shivaji Maharaj Terminus, Mumbai (CSMT) inscribed in 2004
Chhatrapati Shivaji Maharaj Terminus, Mumbai is commonly known as Bombay V.T or Victoria Terminus.
The building is an outstanding example of late 19th-century railway architecture in the British commonwealth characterized by Victorian Gothic Revival and traditional Indian features as well as its advanced structural and technical features.