Tsongmo Lake or Changu Lake is a glacial lake in the East Sikkim, India

India

India , officially the Republic of India , is a country in South Asia. It is the seventh-largest country by geographical area, the second-most populous country with over 1.2 billion people, and the most populous democracy in the world...

, some 40 kilometres (24.9 mi) away from Gangtok

Gangtok

Gangtok is the capital and largest town of the Indian state of Sikkim. Gangtok is located in the Shivalik Hills of the eastern Himalayan range, at an altitude of . The town, with a population of thirty thousand belonging to different ethnicities such as Nepalis, Lepchas and Bhutia, is administered...

 at altitude of 3780 m (12,401.6 ft).

The road to Nathu La

Nathu La

Nathu La is a mountain pass in the Himalayas. It connects the Indian state of Sikkim with China's Tibet Autonomous Region. The pass, at 4,310 m above mean sea level, forms a part of an offshoot of the ancient Silk Road. Nathu means "listening ears" and La means "pass" in Tibetan...

 passes the lake on north side. The Chinese border crossing is only some 5 kilometres (3.1 mi) east-northeast in a straight line, but some 18 kilometres (11.2 mi) by road.

Indian Postal Service

Indian Postal Service

The Department of Posts functioning under the brand name India Post , is a government operated postal system in India; it is generally referred to within India as "the post office"....

released a commemorative stamp on the lake on 6 November 2006.