There is a guy living just outside Oswego Illinois (near Chicago) that has had one sitting in his yard for about 30 years now. He has an HO gauge layout in it...

...go figure.....
I was in one in Ottawa Illinois. It was sitting on a side track that was to be removed when my brother, who works for the railroad, let me know and took me for a visit. Kind of neat, but I wouldn't want to be on one for 8 hours or more a day..

I'm correct 97% of the time..... who cares about the other 4%....