Hi Dean
The park we went to is called Aquadream, which I think was opened in 2006. It is up on the hill behind the Migros in Marmaris. Dolmus takes you there to the front then you can walk up the hill, which is quite steep and if hot is a struggle to some, but there are usually taxi's nearby who will gladly assist for a small fee! Some booking offices will arrange to pick you up from your
hotel and collect you, check out ICR.
I have to say while the views from there are stunning, there were only 9 slides I think and one wasnt working, and there is very little shade, so if you are going, go early to get a bed with shade. Kids had a ball though!
Tania