This was a railway line in the state of Tamil Naddu which was built by the British in the year 1908. The passenger railway moves along 16 tunnels, over 250 bridges and 208 curves. The main stations withing this route are the Mettupalayan, Kallar, Adderly, Hillgrove, Runnymede, Kateri, Conoor Lovedale and others.
The Nilgiri Mountain Railway Toy train is unique as it is the steepest one in Asia. It weaves through forests, along the valleys and into little dark winding tunnels.It was declared a World Heritage Site by UNESCO in 2005.