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
I would suggest you Harihar nasik in Maharashtra which is one of the international tourist spot. trecking is adventurous. i dont know the present climate condition please do a check