Banjhakri Falls
Its a lovely waterfall,surrounded by gardens and stairwells.Many beautifu sculptures can be seen there.A good picnic spot and a must watch for every Gangtok visitor.
Ropeways Cable Car
Deorali market
Rs 500, children Rs 300
Daylight. Can close due to weather
A cable car whose lowest point is Deorali Market, with three stops of varying altitude. Fantastic views of the town. This isn't included in official tours, so you'll have to make your way to Deorali Market to board.
Namgyal Institute of Tibetology
An excellent collection of artifacts and manuscripts connected to tibetan buddhism.