Willy Volk of Gadling wrote a post (well, actually two) compiling the Weirdest Amusement Parks in the world. For example, the Suoi Tien Park, a Buddhist-themed amusement park in Vietnam:
In addition to a giant splash park and various thrill rides, the "amusement park" features Heaven Palace, the Park's vision of eternal life for people who manage to escape the torments of hell after years of gambling, adultery, and taking drugs. If hell isn't enough to scare you straight, the park also features "Bat cave with innumerable bats, Mid air cycling over crocodile farm with more than 1,500 crocodiles of all sizes which cause fearful feeling for tourist." Yikes.
Here are the links: Very Weird Amusement Parks | More Very Weird Amusement Parks - Thanks Willy!