Climbing into the Nilgiris

Travellers have long been drawn to the cool, misty hills, of the Nilgiris. The journey from Mettupalayam to Ooty, winding through the hills and breathtaking landscapes, is an experience in itself. The ghat road rises gently through the foothills, pine trees, and tea gardens, while alongside it, the little blue-and-cream toy train slowly winds its way up the steep slopes towards Coonoor and Ooty.

More than a century ago, however, reaching these hills was a far greater challenge. Two routes eventually made the journey possible—the ghat road crossing the Kallar River and the railway line climbing into the mountains. Each overcame a different challenge, opening the Nilgiris to travellers from the plains.

The Road Across Kallar River

At the foothills, the first obstacle was the Kallar River. The British initially built a wooden road bridge across the river to carry travellers towards the hills. But the mountain monsoons proved too powerful, and the floods of 1891 swept the wooden bridge away.

A stone masonry bridge followed and was completed in 1894, but it too failed to withstand the river's force. The present bridge came much later. Built by Jessop and Co. of Calcutta in early 1920s, the 20-metre pillar less steel truss spans the Kallar river in a single sweep. It provides a more dependable road link for the increasing traffic heading in and out of the Nilgiris.

Today, the Kallar Bridge is regarded as a heritage structure, preserving a piece of the early road history of the Nilgiris. What was once a vital link into the mountains now stands as a reminder of the persistent engineering efforts that made the climb possible.

The Railway into the Mountains

The railway faced a different challenge; which is the steep climb itself. The idea of a railway to the Nilgiris was first proposed by Lord Dalhousie in 1854, but the difficult terrain and enormous cost delayed the project for decades. The first section, from Mettupalayam to Coonoor, finally opened in 1899. The line was then extended to Ooty only in 1908.

The steep gradients demanded an unusual solution. Engineers adopted the Swiss-designed Abt rack-and-pinion system on the section between Kallar and Coonoor, in which a toothed rail between the tracks engages with a cog beneath the locomotive. This gives the train the grip required to climb and descend the steepest mountain slopes. Beyond Coonoor, the railway continues towards Ooty on conventional track, though the climb remains steep, making the necessarily journey slow.

This railway is now part of the UNESCO World Heritage Site. Its route passes through a spectacular variety from tunnels and bridges to some of the most scenic landscapes in the Nilgiris.

One carries us across the river; the other climbs up the mountain. Together, the road and railway opened the Nilgiris to travellers turning what was once a difficult journey into a memorable passage to Ooty 

Ooty's Underground Water Battery, Tamilnadu

A visit to the Nilgiri Hills is mostly about enjoying the weather and exploring its parks and lakes. Rarely do we look deeper at the importance that nature has given these hills and continues to provide. Apart from the lush tea estates, gardens, misty forests, and tranquil waters of the lakes, a quiet, hidden world lies beneath. Deep within the mountain rock, an intricate network of carved tunnels, massive underground chambers, and heavy machinery operates entirely out of sight. 

High in these scenic valleys surrounding Ooty, lies a remarkable engineering marvel: the Kundah Hydro-Electric Scheme. Hidden from our view, this sprawling network of reservoirs and subterranean powerhouses has silently balanced it's waters and generated electricity for Tamil Nadu for decades.

The story goes back to the early 1960s, when the Kundah hydroelectric projects were developed with assistance from Canada under the Colombo Plan. The first powerhouses in the wider Kundah Valley became operational in 1960.

A few years later, construction moved into the high-altitude forests. The Porthimund and Parsons Valley dams were completed by the mid-1960s, adding more reservoirs to the system.

For decades, these reservoirs ran a traditional, one-way gravity system, channeling mountain runoff waters down to the 30 MW Kundah Power House 6. Once those waters spun the conventional turbine and drained into the lower lakes, it was gone. Six decades later, these old reservoirs are taking on a new role in the age of renewable energy.

While the original Power House 6 continues its traditional role, TANGEDCO and contractor MEIL have built a brand new, parallel system right next to it. The 500 MW Underground Pumped Storage Project (PSP) creates a closed-loop recycling circuit using the staggered reservoirs and works like a giant rechargeable battery 

Parsons Valley Reservoir at about 2,200 metres above sea level, acts as a feeder checkpoint, diverting the streams through an underground tunnel. This keeps the network balanced apart from supplying water to the Nilgiri district. 

Porthimund Reservoir system, at about 2,220 metres above sea level, acts as the upper reservoir, holding millions of cubic metres of water.

Below, at around 1,985 metres, the Avalanche-Emerald reservoir system, form the lower reservoir.

The difference in elevation between the upper and lower reservoirs gives the system its stored energy.

When electricity demand rises, water is released from Porthimund and sent rushing downhill through large underground pipes. Its force drives reversible turbines deep inside an underground powerhouse, generating electricity before the water settles in the lower reservoir.

It is much like switching on a giant battery—except the stored energy is water held high in the mountains.

When demand falls, particularly during off-peak hours, the process reverses.

Surplus electricity from the grid is used to run the turbines backwards. They become powerful pumps, pushing the water uphill from Avalanche-Emerald lower reservoir back to Porthimund. The water is then ready to generate electricity again.

The same water can therefore move up and down repeatedly, allowing the system to store energy when it is available and release it when it is needed.

The most remarkable part of this project is that it preserves the local biodiversity completely intact. The landscape above remains an untouched haven of forests, lakes, and wildlife. Yet deep beneath it, water quietly flows through a hidden network of tunnels, storing energy and sustaining the power grid. 

Sometimes, the most impressive engineering is not what we see. 

It is what remains hidden, working quietly beneath our feet. 

Tribes Of Nilgiris, Ooty

The Nilgiri Hills stand at the breathtaking tri-junction where Tamil Nadu, Karnataka, and Kerala meet. These peaks get their legendary name from the blue Neelakurinji flower, a rare shrub that blooms just once every 12 years, painting entire mountain ranges in a vibrant sea of violet and blue. 

Long ago, these high hills were inaccessible. The terrain was protected with granite cliffs and dense, thorny jungle mesh at the base. Furthermore the deadly, malaria-infested belt in the lowlands and the secretive, guarded paths of the native tribes made it even more difficult.

Today, tea gardens and holiday resorts cover much of the landscape, a legacy of the British era.

Exhibits of life size tribe models

Despite these changes, Nilgiris remains home to several Adivasi communities, including the Todas, Irulas, Kotas, Kurumbas, Paniyars, and Kattunayakans who live in pockets along this hill. Their lives changed greatly since colonial rule, when ancestral lands were transformed into commercial plantations and many were drawn into plantation labour. Today, the few who remain in these hills continue to balance the modern life with the preservation of their unique culture and traditions.

A Toda village in recent times

Protecting this tribal heritage is important because these communities carry generations of irreplaceable knowledge about the land, medicinal plants, and sustainable ways of living in harmony with nature.

The museum exterior

To preserve and document this heritage, the government established the Tribal Research Centre (TRC) in 1983 at Muthorai Palada, about 10 kilometres from Ooty. Its campus includes a fascinating Tribal Museum showcasing traditional weapons, pottery, jewellery, and other cultural artefacts, a short documentary on the lifestyle and traditions of the tribals, along with life-size replicas of indigenous dwellings, including the distinctive barrel-shaped Toda huts. With newly laid roads, this museum is open to public and is a must-stop for anyone exploring Nilgiri Hills.

Photographs on the upper floor

In a landscape transformed by roads, plantations, and modern tourism, this establishment quietly reminds us that the oldest stories of the Nilgiris do not live in its tea gardens or colonial buildings, but in the people who have called these hills home for centuries.

Exhibits displayed

The TRC is situated along the scenic Ooty–Avalanche Road, open Monday to Friday from 10:00 AM to 5:00 PM. The entry fee is 50/ for adults & 25/ for children. It also offers a small collection of the red, black, white, GI-tagged Toda embroidery.