Whats the most bizarre exhibit youve ever encountered?

I'm not talking about the usual tourist traps or the predictable roadside attractions. I'm looking for something truly unique, something that truly captures your attention and leaves you scratching your head in wonder.

I'm open to anything, from the bizarre and bizarre to the bizarre and beautiful. I'm also open to anything that's educational or thought-provoking.

So, tell me, what's the most bizarre exhibit you've ever encountered?