The text mentions various details about the train journey from Mettupalayam to Ooty via Coonoor on the Nilgiri Mountain Railway. The train is a popular tourist ride and departs from Ooty at 14:00 hours and reaches Coonoor at 15:05 hours. From Coonoor, it takes around an hour and a half to reach Ooty. The total track is 46 kilometers and includes 16 tunnels and over 250 bridges, offering picturesque views of the Nilgiri Mountains. The journey can be booked online in advance as it is a popular route. There are different classes of coaches available, including first class for a more comfortable experience. The train was built by the British in 1908 and is a 1000 mm metre gauge railway.