Gotland, Sweden, Kneippbyn

If you aren't from Sweden the Piipi Longstocking won't mean much to you (and doesn't to me), but apparently she is a very popular children's character. Kneippbyn is a theme and waterpark combined, based loosely on the above character (the house on the site is where the TV shows were filmed). For us, it was a great combination of water slides and rides, and in particular not having some awful fascist stopping small children using water slides because of safety concerns was very refreshing. They are my kids, it should be up to me what sort of risks they take. But I digress - if you have kids between the ages of 3 and 13 they will love this place.