A train on the meter gauge Nilgiri Mountain Railway enters tunnel No. 13, then glides over a curved bridge through Glendale tea gardens en route to the plains at Mettupalayam; powered by the 2nd India built oil fired steam engine X 37397, at 3.40 PM on August 8, 2012. The girders of this bridge were built in 1896 at Middlesbrough by The Teesside Bridge & Engineering Works Ltd. Opened on June 15, 1899, this meter gauge hill railway is a UNESCO World Heritage Site from 2005, and it is the only one of its kind in Asia..
V.M.Govind Krishnan's book: "NMR [Nilgiri Mountain Railway]-From Lifeline to Oblivion", documents the efforts of the public to thwart the moves of the Indian government to dismantle this unique rack railway which is now in its 114th year; and to keep this engineering marvel in running condition to this day. Nilgiri Mountain Railway is the only metre gauge (1000 mm) rack railway in Asia.