Tsongmo Lake , also known as Changu Lake , is a glacial lake in East Sikkim, 40 km from Gangtok. It is a popular tourist attraction with changing colours, flowers, birds and yaks. Tsomgo Lake , also known as Changu Lake, is one of the most striking natural wonders in Sikkim. Surrounded by steep snow-clad mountains and set at an altitude of about 3,753 meters (12,313 ft), this oval-shaped glacial lake changes its appearance with the seasons. Foreign nationals can only visit up to Tsomgo lake . They are not allowed to proceed further to visit places such as Baba Mandir or Nathula Pass. Geography and Location of Changu Lake (Tsomgo Lake ) The lake is located in the East Sikkim district near the Indo-China border. It lies at an altitude of about 3,753 meters (12,313 feet) above sea level. Steep mountains surround the lake , and its waters reflect the surrounding peaks, creating a picturesque and serene atmosphere. Welcome Board at Tsomgo Lake Tsomgo Lake was formed due to glacial activity caused during the last Ice Age, which sculpted the landscape of the Himalayas. The lake ...