European/UK Road Trip! Woo!
In addition you have further north in Germany, Movie Park, which is very similar to a Universal Studios park and recently opened the worlds largest X-Men stunt show which was co-directed/written by J Michael Roddy who's work you might know from Universal Orlando. In addition there are Phantasialand and Heide-Park.
Old churches, palaces and townhalls are not that different from each other and those arround the Europapark are better or the same levels as some much better known ones further away. A combination with Paris doesnt sound like good idea for a theme park fan, the trip just takes 4 hours with the new tgv line. Sine someone mentioned Neuschwanstein above, thats indeed a unique quality, just like Versaille.