The Kalka– Shimla railroad is a 2 ft 6 in 762 mm limit check railroad in North India which crosses a for the most part rugged course from Kalka to Shimla. It is known for sensational perspectives of the slopes and encompassing towns. The railroad was worked in 1898 to interface Shimla, the late spring capital of India amid the British Raj, with whatever remains of the Indian rail framework. Amid its development, 107 passages and 864 scaffolds were worked along the course. The undertaking's main architect was H. S. Harington.
Its initial trains were fabricated by Sharp, Stewart and Company. Bigger trains were presented, which were made by the Hunslet Engine Company. Diesel and diesel-pressure driven trains started task in 1955 and 1970, separately.
On 8 July 2008, UNESCO added the Kalka– Shimla railroad to the mountain rail routes of India World Heritage Site.