One of the most frequent questions I get asked is how to get to Moominworld/Muumimaailma in Finland. It seems as though once people find out Moominvalley exists, they make it their life goal to visit (that includes me too). I found out about it six years ago when I was 14 and finally managed to go when I was 18.
I must fret that it isn’t a theme park as you know them to be. There are no rides. I personally think that would be awful if there were, because it is definitely a unique experience and the Finns are very proud of it. The best way to describe it is to say that they have built Moominvalley from the books/90s TV series.