Mussoorie offer some walks around the town. On walk you can take from Library Point to Landhaur Market via camel's back road. It is still free from noise and offers beautiful views.
On the way back to Dehradun from Mussoorie take the opportunity to see Bhatta Falls. 2-km trek, 3 km away from Mussoorie. Mussoorie Lake is also another site to relax that is located on the same route. Boating is available there.
Kempty Falls
About 15 km from Mussoorie, this now over-built spot is a popular tourist destination. Catch a taxi or a bus from the Library stand.
It is a government initiative, a man made beautiful park with artificial falls and fun rides. From Gun Hill Point rickshaws are available. It costs 100/- fixed rate per person round trip.
You can enjoy the trolley ride to Gun Hill to view the splendid view of all the city and ice capped Himalaya. Trolley charge is ₹55 round trip. Lots of photographic opportunities available as traditional dress being worn by populace is common. Up there, it is like a small fair with lots of stalls for games, snacks and nick-knacks.
A couple kilometres from the Library end of the Mall, Happy Valley is a 5,000-strong Tibetan settlement. This is a beautiful spot for a short hike. Taxis and possibly bicycle rickshaws ply this route.
Jawahar Aquarium has a very nice collection of fish. Entry ticket is only ₹15.