The enchanting Tsomgo Lake is the prime attraction in Nathula pass and is located at a distance of 35 km from Gangtok at an altitude of 2000 feet. It is situated on the ancient trade route from India to China and before 1962, the goods were transferred through this route between the two countries. The lake is 15 m deep with length of about 1 km and is about 20 km from Nathula Pass. It gets entirely frozen during winters due to extreme decrease in temperature in the region while in spring the blossoming flowers add a riot of colors all around it. Earlier known as the Changu Lake, it got its name from the Bhutia language that means the ‘source of lake’. The water collected in the lake is formed by the melting of the snow located across the region. An old Shiva Temple is also located near the lake. A river named Lungtze is also originated from this lake. There are some small shops near the lake selling local items and woolens to the tourists. Nestled amidst deep serenity and eye- catching ambience, the Tsomgo Lake is surely an amazing place to be seen while travelling to Nathula.