Note that these water parks only tend to be open in the summer months.
See also: Madrid Theme Parks
1. Aquópolis de San Fernando Near in Madrid
The closest water park to Madrid.
Open from mid-June until the end of August.
Take either any of the following buses from the Avenida de America bus station: 223, 227, 229, N22, 221, 224A and 226.
Read more about Madrid Bus Stations
2. Aquópolis de Villanueva de la Cañada
The same company as the above water park, but open longery (the don't close until the end of the first week of September). A little further out from Madrid, but not much.
Buses 623 and 627 will take you to Aquópolis de Villanueva de la Cañada (from Moncloa bus station), as well as 581 (Principe Pio bus station)
Read more about Madrid Bus Stations
3. Aquasur Aranjuez Water Park near Madrid
If you're visiting Aranjuez, this is a great place to visit after you're done with all that cultural stuff!
There is a free bus from the town center.

