Lest you think this thing is devolving into some sort of baby animal museum, I just found the website for the Division of Rare and Manuscript Collections at the Cornell University Library, and it's ripe with weirdness and backwards scientific and spiritual beliefs of past eras. Pictures of werewolves and gorgons? check. Crazy elephant people? check.
creepy witchcraft stuff? You better believe it.
I wish I could recommend a section, but they're all pretty fun and odd. Make sure you read the captions, because there's some cool stuff in there. My favorite would probably be the danse macabre stuff, but really, there's enough crazy to go around.