Buthan is good.. and Bali is also good as well..
in India leh,Manali is good and in south India you can try ooty, munnar, mysore, hampi ,
if you are looking for offbeat destinations you can try meghalaya, tripura assam, nagaland
There are lots of national and international places where you can adventure. But I suggest you some places and adventure which you should tr:
For Domestic India -
Bir Billing for sky diving. And international Singapore. AJ Hackett area. Bali for snorkeling. Mauritius for underwater restaurants. Thailand for Thai massages
And walking street
There are various places in Himachal Pradesh which are ideal for travelling in this time of the year . You can go to Dalhousie , Dharamshala , Amritsar. Even you can go to Simla , Kullu , Manali. Nepal is also a good choice for travelling in this time of the year.