The Kalka-Shimla line is the Himachal component of the Mountain Railways of India World Heritage property
Background
The Mountain Railways of India is a World Heritage property made up of three lines: Darjeeling, inscribed in 1999, Nilgiri, inscribed in 2005, and Kalka-Shimla, inscribed in 2008.
The three lines lie in West Bengal, Tamil Nadu and Himachal Pradesh, and the property is held under the protection of the Ministry of Railways.
Indian Railways is the owner of four UNESCO accorded World Heritage Sites: the Darjeeling Himalayan Railway, the Nilgiri Mountain Railway, the Kalka Shimla Railway and Chhatrapati Shivaji Terminus, which was inscribed in 2004.
Two more railway properties are in waiting on the tentative list, the Matheran Light Railway and the Kangra Valley Railway.
Himachal Pradesh also holds the Great Himalayan National Park, inscribed in 2014, which is a natural World Heritage site rather than a cultural one.
Indian Railways maintains 34 museums, heritage parks and heritage galleries and has preserved about 230 steam locomotives and 110 vintage coaches and wagons.
In plain words
Tentative list Tentative list — The national inventory of sites a country may later nominate for World Heritage status.
Serial property Serial property — A single World Heritage listing made up of several separate component sites.