Most wanderfull place in India. Small place like a haven that is Gangtok. If you never go there you need to go Gangtok. There are many things to enjoy but I want to mention some important place in Gangtok that you should to go and enjoy there.
Roffe way is the most intersting things to do there.
China broder another place that you need to go when you go Gangtok.
Lake , some lake are like fellowers on a place in Gangtok so should watch every Lake.
4.Temple are most important vigiting place in Gangtok. So also list to watch or vigit those temple.
Some botanical garder also there so you also plan out to find them and enjoy it.
Sikim is very good state and Gangtok it's capital so don't miss it to vigit every place in Gangtok.
Any time of the year you can go for vigit Gangtok but oct to jan is the best time to enjoy there.