The correct answer is: All of the above.
Nathu La is a high mountain pass on the Indo-China border, located in the Himalayas. It is a popular destination for tourists due to its scenic beauty, trade markets, and military significance.
The pass is located at an altitude of 4,310 meters (14,140 feet) and is the highest motorable road in India. It is open to tourists from April to November. The pass offers stunning views of the Himalayas and the surrounding mountains.
Nathu La is also a major trade route between India and China. The pass was closed for trade for over 40 years after the Sino-Indian War of 1962. It was reopened in 1992 as part of a confidence-building measure between the two countries.
The pass is also of great military significance. It is located on the Line of Actual Control (LAC), the de facto border between India and China. The pass is heavily guarded by both Indian and Chinese troops.
In conclusion, Nathu La is a popular destination for tourists due to its scenic beauty, trade markets, and military significance.