German guy here.<br>I've been in this waterpark a few years back. Back then, the waterpark itself was already finshed, but the "green area" (in one corner there's pretty much only few animals + trees and other plants as you could see) only was a small path back then with few trees and palms left and right.<br>The biggest problem with this water park is that it's pretty expensive. I went there with my class in our "last" year (10th grade secondary school), so my parents had to make up for it, but it's really not recommandable if you're not a) pretty wealthy or b) in desparation for some "tropical" (= warm humid air) feeling. So it's never worth going there in summer, only in winter if you really need to but even then normal indoor water parks (there are plenty of them in Germany) are a much better choice, because they are quite a lot bigger (in terms of attractions, pools and their variety), cheaper.<br>But being inside there is pretty impressive. And the sight when you're on top of the biggest water slide gives a nice overview. :)