Most everyone has seen the urban explorer pictures from inside River Country, with the park being all over grown and dilapidated. But check out this link for some freaky pictures of inside Discovery Island. WTF is going on in that picture with the mason jars and Coke bottle. And the cages! And vultures! Crazy stuff.
Also, if you ever get a hankering to go visit these places yourself...DON'T! It's a really really bad idea. Just so you know.