nilgiri mountain railway. tamil nadu state, india. blue train. unesco heritage. narrow-gauge. railroad, turnout gear

arrow blue car coach commercial coonoor crossing filling gauge guage heritage india indian loco locomotive mettupalayam mettuppalayam mountain narrowguage nilagiri nilgiri old ooty platform rackandpinion rackrailway rail railroad railway rubble service sightseeing station steam tamilnadu tourism track traditional train transportation travel udagamanadalam udhagamandalam unesco world