The Mountain Railways of India are three fully operational railway tracks that are fine examples of 19th century technology and the changes they brought with them. These railways built during the British colonial period stimulated population movements between the plains and the mountains.The site includes the following 3 railway systems:- Darjeeling Himalayan Railway: the first of the railways to become a WHS; it is a 86 km long narrow gauge railway from Siliguri to Darjeeling in West Bengal,