Nilgiri Mountain Railway

Nilgiri Mountain Railway uses 'X' Class steam rack locomotives, manufactured by the&Swiss Locomotive and Machine Works of  Winterthur  in Switzerland, on the rack and pinion section of its tracks. The X Class locomotives are six to eight decades old. These locomotives give Nilgiri Mountain Railway a distinct charm, taking scores of passengers to Coonoor and Udhagamandalam, crossing 45.8 kilometres (28 mi), 108 curves, 16 tunnels and 250 bridges.

The uphill journey takes around 290 minutes (4.8 hours), and the downhill journey takes 215 minutes (3.6 hours). It has the steepest track in Asia.