House on the rock in Wisconsin is a very strange collection of collections.
Need to go. It looks almost identical to a house that was in a recurring dream I had as a kid. It was the house I wanted to live in, with a room full of pianos of all shapes and sizes lining the walls, ceiling and floor, another room that was just an interconnected series of waterfalls and water-slides that defied gravity. I think this is it’s nearest IRL replica.
It’s also supposedly featured in one of Neil Gaiman’s books? Another big reason it’s at the top of my travel to do list.