Inspired by a discussion on another forum in which the phrase "no one on Star Trek poops"...
Where's the strangest place you've ever seen/found/used a working toilet?
Now, I don't mean you're on a hike and there's a little shack with a toilet over a septic tank (this happened to me in Red Rocks once). I mean, just, a toilet. Hanging out. Doing toilet stuff.
For me... when I was a kid, my grandparents had... not a yacht, but a 40-or-50-foot "houseboat". We used to take it out off the Atlantic coast to go fishing on Saturdays. I only ever slept in it once. Mostly they just drove it from their house to the Boat Club and back. The boat was technically a 2/2, because it had not only a full bathroom (though small) with a toilet, shower, and sink, but also a toilet in the master bedroom.
Just a toilet. No sink, no nothing else. You lift up a seat cushion where you might normally sit while putting on your shoes and, underneath it... TOILET.
I don't think they ever used it, but I always wanted to. Just to try.