The Kalka Shimla Railway is a narrow-gauge railway in India that connects the towns of Kalka and Shimla. It was inaugurated in 1903 and is renowned for its scenic views of the Himalayas. The railway spans approximately 96 kilometers and features 102 tunnels and over 800 bridges, making it a remarkable engineering feat. This railway is a UNESCO World Heritage Site, recognized for its historical significance and stunning landscapes. It operates steam and diesel locomotives, offering tourists a unique travel experience through lush forests and picturesque villages. The journey is popular among visitors seeking to explore the beauty of Himachal Pradesh.