Jawahar Aquarium has a very nice collection of fish. Entry ticket is only ₹15.
It is 5 km away from the library bus stand. From Dehradun to Mussoorie, for Jharipani one has to take a right turn 11 km before Mussoorie. Motorable roads are nicely maintained by the government. To reach the falls from main road. It's a 2-km trek.
Tibetan Buddhist Temple
free
It is located on the Happy Valley road close to the IAS Academy. The temple can be visited between 7AM to 5PM. Mussoorie was the Dalai Lama's first place of refuge when he fled Tibet, before he was granted land in Dharamshala by then Prime Minister Jawaharlal Nehru.
About 5 km before Kempty Falls on the Mussoorie-Kempty road is a good picnic spot with accommodation and restaurant facilities; boating is also available. With the Kempty river flowing through it, Lake Mist has many small waterfalls made by the river.
A scenic, 5-km uphill walk from Picture Palace to the highest point in Mussoorie. Passes through Landour Bazaar.Old light house is the nice thing to see there. It's a long walk to Lal Tibba from Picture Palace, about 2 to 3 hours.
The mall road is long stretch of road surrounded by shops, restaurants, and hotels.
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.
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.
An interesting place on the way to Dhanaulti which uses natural dyes to produce hand-woven shawls, scarves and throws from wool, eri silk and pashmina. They have a shop 8 km from Mussoorie on the Mussoorie-Dhanaulti Road.
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.
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.