1). Manali
Things To Do: Fishing, white water rafting, paragliding, skiing, mountaineering, and hiking
2). Leh and Ladakh
Things To Do: excellent hiking and para gliding, onger trekking trails, rafting
3). Nainital
Things To Do: Nature walks, trekking, horse riding, and rock climbing, forest walks
4). GOA
Things To Do: water sports, go-karting, scuba diving and snorkeling, hiking, fishing, and dolphin (and crocodile!) sightseeing trips, trekking
5). Rajasthan
Things To Do: desert camel safaris, hot air ballooning

That was a nice list. Thanks for sharing.