William Huddleston was the British engineer who designed and supervised the construction of the Nilgiri Mountain Railway.

The Nilgiri Mountain Railway was completed in 1899, after a construction period of six years.

The Nilgiri Mountain Railway has a total length of 46 kilometers (28.6 miles).

The Nilgiri Mountain Railway has a total of 16 stations, including the terminus stations at Mettupalayam and Udagamandalam.

The Nilgiri Mountain Railway has a maximum gradient of 1 in 12, which means that for every 12 meters of horizontal distance, the railway rises by 1 meter.

Steam locomotives are used on the Nilgiri Mountain Railway, as they are able to provide the necessary power and traction to climb the steep gradients.

The Blue Mountain Express is the most famous train that runs on the Nilgiri Mountain Railway. It is a luxury train that offers a unique travel experience.

The Nilgiri Mountain Railway was declared a UNESCO World Heritage Site in 2005, in recognition of its outstanding cultural and historical significance.

The Nilgiri Mountain Railway is a major tourist attraction, a vital transportation link, and a symbol of British engineering prowess. It is also a UNESCO World Heritage Site.

The Nilgiri Mountain Railway passes through a total of 16 tunnels, which were constructed to allow the railway to navigate the steep terrain.

The Nilgiri Mountain Railway reaches its highest point at 2,200 meters (7,200 feet) above sea level, at the station of Kallar.

The Nilgiri Mountain Railway crosses a total of 250 bridges, which were constructed to span the numerous rivers and streams along the route.

The Nilgiri Mountain Railway has an average speed of 10 kilometers per hour (6.2 miles per hour), due to the steep gradients and winding مسیر.

The journey on the Nilgiri Mountain Railway typically takes around 5 hours, depending on the number of stops and the traffic conditions.

The fare for a ride on the Nilgiri Mountain Railway is currently 300 rupees (approximately $4) for a one-way ticket.