Uttarakhand is one of the most popular adventure destinations in India. Especially for its treks! The Roopkund trek is one of a kind trek that leads one to the Roopkund Lake, which is surrounded by hundreds of human skeletons. Not just the Roopkund trek, but Uttarakhand is known for hosting a lot of other magnificent treks like the Nag Tibba Trek, Kalka-Kasauli trek and so on. Do make sure that you plan the trip during the right season since trekking is not open throughout the year.