Nilgiri Mountain Railway

Listen first. Somewhere below the station, a steam whistle cuts through the cool air. Then comes the slow, heavy breathing of the engine, a rhythm you feel in your chest before you see the smoke. The platform smells of coal, wet stone and eucalyptus. Here in Coonoor, the mist often hangs low over the tea slopes, and the little blue-and-cream carriages come out of it slowly, as if the hills are letting them go.

This is the Nilgiri Mountain Railway. It is a metre-gauge line, which means the rails sit about one metre apart, narrower than India's main lines. It climbs from Mettupalayam, down on the hot plains, up through Coonoor and on to Udhagamandalam, the hill town most people call Ooty. Coonoor sits close to the middle of that journey. It is also the place where the character of the railway changes completely.

The idea of a railway into these hills was discussed for decades during the nineteenth century. Under British rule, the Nilgiris had become a summer retreat. Officials, soldiers and planters wanted an escape from the heat of the plains below. The problem was the mountain itself. The slopes rise sharply, and an ordinary train simply cannot grip rails at that angle. The first section of the line, up to Coonoor, finally opened in 1899. The extension to Ooty followed in 1908.

Here is the first surprise. Between Mettupalayam and Coonoor, the train does not rely only on friction between its wheels and the rails. A toothed rack runs between the rails. The engine carries cog wheels that lock into those teeth, and it pulls itself up the hill almost like climbing a ladder. This is called a rack-and-pinion system. On parts of this section, the gradient is roughly one in twelve. That is extremely steep for any railway.

The locomotives built for this work are a story of their own. The steam engines on the rack section belong to a class designed in Switzerland, at a locomotive works in the town of Winterthur. Swiss engineers understood mountain railways well. Their own country is full of them. Over the decades, some of these engines have been rebuilt in India, and the workshops here have kept the old machines running long after most steam disappeared from Indian railways.

Watch how the engine sits on the train. On the climb, the locomotive usually pushes from below rather than pulling from the front. It is placed at the downhill end. This is a safety choice. If a coupling failed on such a slope, carriages pushed from below would not roll away behind the engine. It is a small detail, but once you notice it, the whole train looks different.

Coonoor is where steam often gives way. Above this town, the slopes become gentler, and the rack is no longer needed. For the run on to Ooty, diesel locomotives typically take over. So the station here is a working place, not just a stop. Near the tracks stands a locomotive shed, where engines are serviced, coaled and watered. If you come early, you may see crews preparing a locomotive for the day.

In 2005, UNESCO added this line to the World Heritage Site called the Mountain Railways of India. The Darjeeling Himalayan Railway had already been listed. The Kalka to Shimla line joined later. UNESCO recognised these railways as bold engineering solutions to the problem of reaching the mountains. For the Nilgiri line, that recognition also protects something rarer: a rack railway still carrying ordinary passengers every day.

The journey up from the plains is slow. On the rack section, the train often moves at little more than walking pace. Travellers pass small stations with old British names, such as Hillgrove and Runneymede. The line runs through tunnels cut into rock and across bridges over deep ravines. The vegetation changes as you climb. Banana and areca palms on the plains give way to forest, ferns and, finally, the neat green rows of tea.

Here is the second surprise. Many Indian visitors know this train from the movies. In the late 1990s, a famous Hindi film song called Chaiyya Chaiyya was filmed with dancers performing on the roofs of the carriages, high in these hills. For a whole generation, the image of people dancing on a moving mountain train belongs to this line. Please do not try it yourself. It was a film set, and the roofs are strictly off limits.

Look around Coonoor station itself. The building is modest, with sloping roofs designed to shed heavy monsoon rain. The platforms are short, because the trains are short. A handful of carriages is all the engine can push up the hill. Station staff, porters and tea sellers move between the passengers. Families wait with bags and snacks. For many local people, this is not a heritage ride at all. It is simply how you get up and down the mountain.

The town around you grew partly because of the railway and the tea. The Nilgiris, a name that means Blue Mountains, take that name from a bluish haze that often settles over the ridges. The railway brought tea out to the plains and brought visitors up. Coonoor became a quieter alternative to Ooty, with gardens, colonial bungalows and estates spreading across the slopes. Even today, the train and the tea trade feel closely linked here.

So, before you walk on, stand still for a moment. Feel the cool damp air on your skin. Listen for the hiss of steam, the clank of a coupling, the call of a station worker. Look at the rails curving away toward the hills, and imagine the engineers who first stood here, wondering how to climb them. When the next train leaves, notice how slowly it moves... and how much patience it took to build a line that still climbs this mountain today.