Located in the Black Hills of South Dakota, the Cosmos Mystery Area is a perfectly campy way to spend an afternoon. The entire location is kind of like a wonky fun house in the woods where gravity doesn't act as it should. It was pretty quiet on the rainy day that we were there so we ended up getting a private tour.
Inside one of the cabins they show you how you can balance while sitting in a chair over a thin ledge. There's also other random demonstrations where water appears to drain upwards, and where gravity seems to be pulling you in different directions. Even the trees in the area are all wonky as though they're being pulled by some magnetic force.
Some of it is actually pretty convincing, but it's mostly all illusion. Still, it was something out of the ordinary and we had some pretty good laughs trying out the different demos.