Good question. I hope to see some enlightening answers as I haven't been to many places. The funnest places I have been are Florida and Alaska. Florida probably fits more with most peoples idea of fun, but I really enjoyed the wildlife and beauty of Alaska. Each time I have been to Alaska it has been in the Summer. Don't think I would like the Winter.
In Alaska, we mostly stayed on the Kenai Peninsula. We saw Moose just about everyday. Bears more like a couple times a week. My wife loved seeing the Otters swimming.
Not every one has fun the same way, so the state would need a diversified climate and topography. A coastline, mountains, deserts, lakes, forests and so on. One such state is California ... and here I am! Just lucky, I guess.
This post was edited by Benedict Arnold at August 22, 2017 9:42 AM MDT