At the Mountains of Madness is one of the rare, yet always magnificent, novellas by H.P. Lovecraft. It was written back in 1931 and is rightly considered among Lovecraft's greatest oeuvres. Set in the Antarctic, the Mountains of Madness is a brilliant tale of cosmic horror, that casts a wild view at archaeology, provides with more than a few ancient horrors and still manages to terrify on a wholly different level than your average bogeyman story. Then again, reading is believing, and by following this link you'll be able to, yes, read the whole story in all its literary glory. For free of course.