One of the best Gangtok tourist places, this grand natural habitat in Gangtok boasts of rich flora and fauna of the normal, endangered and nearly extinct varieties. Stretched over an area of around 850 sq km, this biosphere reserve is one of the few high altitude reserves in India with musk deer, snow leopards, and Himalayan tahr. Thats not all! The ticket to the bio reserved is nominally priced, so you'll have a ball of a time with your friends and family. Make sure to take them with you. Don't forget to carry your camera to take lots of photographs of the beauty of this place.