The Silk Route of SIkkim India has several such high altitude beautiful lakes and one of the most beautiful is surely the Kupup Lake. Locally called Bitan Cho, it is one of the most sacred lakes of Sikkim, with high mountains and valleys bordering it. Owing to its resemblance to elephant, Kupup Lake is also known as Elephant Lake. The lake nestles at an altitude of 13,066 feet, on the way to Jelepla Pass, bordering area with China and India.