I like how Cool5 uses a Dutch word in a title and a German word in his post. I actually hoped it was about a pool in Germany or The Netherlands, but I hoped wrong. Damn you Cool5. I know German and Dutch get mixed up a lot by the entire world, because both languages are pretty similar. But I'm pretty sure you should have known better!
Try Schwimmbad or Freizeitbad. Those are a lot more common in the German language. As for Reifenrutschen, try: Bandenglijbaan. That would be the Dutch word for that. (Now I wonder how many people are going to try to pronounce those words.
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Looked like fun slides tho, too bad about the inner-tube slides. Body slides are the best slides!