Tsongmo Lake : An ideal day trip from Gangtok is a visit to Tsango Lake. With an average depth of 50 ft, this spectacular lake is situated 37 km north east from Gangtok at an altitude of 3,752 metres on the Gangtok - Nathula highway. The road with an awesome precipice on one side takes you through the Kyongnosla Alpine Sanctuary. The snow and the frozen lake make it even more exciting during the winter months..