Island of the Dolls– Xochimilco, Mexico
If the Catacombs didn't creep you out, the Island of the Dolls will. A man who moved to the island to live claims to have encountered the ghost of a young girl who wanted him to be a ghost with her. To try and appease her, he bought dolls and hung them from the trees of the island. He later drowned in the same spot the girl died, and the dolls remain in the trees for visitors to see when they visit the islands.