12 Incredibly Strange Underground Realms from Science Fiction

Don't judge a book by its cover. Beauty is only skin deep. There are countless aphorisms about looking below the surface of things, because you never know what you might find — for instance, if you looked below the surface of the Earth, you might find lost civilizations, underground empires, and/or lots and lots of… » 1/02/14 10:00am 1/02/14 10:00am