The railway line from Kalka to Shimla was built in

The railway line from Kalka to Shimla was built in 1903. This railway line, known as the Kalka-Shimla Railway, is a UNESCO World Heritage Site and is famous for its scenic beauty and engineering marvels. It was constructed during the British colonial era to provide connectivity to the hill station of Shimla, then the summer capital of British India. The railway line covers a distance of approximately 96 kilometers and passes through numerous tunnels, bridges, and picturesque landscapes, making it a popular tourist attraction in Himachal Pradesh.