One of the most adventurous things you can do while you are in Sikkim is to take a ride on the grumbling waters of Teesta River. The water is extremely icy and turbulent, giving you a lot of jerks as your travel on them. This one is sure to pump your adrenaline.
Location: Teesta River, Sikkim
For: Mostly young group of friends and couples.
Difficulty level: Hard
Approximate Cost: It will cost you INR 400-500 for a 1-2 hr ride per person in the river.
Why you should do it: To go on a challenging ride over the turbulent waters of River Teesta.
Tips: Don't forget to wear your helmet and pull the ropes of your jacket tightly.