Located at an altitude of 14,140 feet and 56kms from Gangtok, Nathula Pass was the place through which the famous Silk Route used to operate until 1962. This used to be the silk trade route between India and Tibet. Lines of mules used to carry silk, gold and many other items from Tibet to India and take daily essentials back to Tibet.
The fenced Indo-China border is also few meters away and you can see both Indian and Chinese soldiers guarding the border. The guards are friendly. A stairway leads to the border. There is no 'no mans land' here.