The Chumbi Valley, called Dromo or Tromo in Tibetan,
is a valley in the Himalayas that projects southwards from the Tibetan plateau, intervening between Sikkim and Bhutan. It is coextensive with the administrative unit Yadong County in the Tibet Autonomous Region of China. The Chumbi Valley is connected to Sikkim to the southwest via the mountain passes of Nathu La and Jelep La.
Chumbi Valley, 1938.
Dungkar Monastery, 6 miles to the north of Yatung. This is the entrance to the main shrine room with the house of the Abbot on the right. Photo taken 1 January 1927.
Nathu La(Tibetan: རྣ་ཐོས་ལ་, Wylie: Rna thos la, THL: Na tö la, Sikkimese: རྣ་ཐོས་ལ་) is a mountain pass in the Dongkya Range of the Himalayas between China's Yadong County in Tibet, and the Indian states of Sikkim. But minor touch of Bengal in South Asia. The pass, at 4,310 m (14,140 ft), connects the towns of Kalimpong and Gangtok to the villages and towns of the lower Chumbi Valley.
Image: Nathu La, a mountain pass in the Himalayas on the Indo China Border
Image: Nathula Pass Border trade road panoramio
The German expedition to Tibet crossing Nathu La.
Sikkim, Chumbi Valley, with the Nathu La pass (CIA, 1965).