Oh I've visited Fun Valley which is at equal distance from Dehradun(30 Km), Haridwar and Rishikesh and is really nice place to enjoy in water.
Good thing is that even during summers the water is cold and clean enough to enjoy.
Timings
Open throughout the year. It's open time is 9 am to 5.30 pm in summer and 9 am to 4-5 pm in Winters. During winter water park will not be available. But other Coaster, Go karting etc will be.
The Asan Barrage is a barrage in the Uttarakhand-Himachal Pradesh border region in Doon Valley, (Dehradun District), northern India, situated at the confluence of the Eastern Yamuna Canal and the Asan River and about 11 km (7 mi) from Dakpathar, and 28 km. northwest of Dehradun.
We had the opportunity to visit Asan Barrage in March, 2014, which falls in the Chakrata Road but before we reach Ponta Sahib while going from Dehradun. It is around 45 km from Dehradun. The road is good enough.
