Figured this would be an appropriate choice, with Halloween upon us this week. Some people may not realize, but Metallica (at least in the early days) drew a lot of inspiration from the works of H.P. Lovecraft. This tune was inspired by the story, "The Shadow over Innsmouth," which is also the basis for Call of Cthulhu: Dark Corners of the Earth (also available on XBox).
If you've never read Lovecraft, do yourself a favor and check out his work. Many modern horror authors, including Stephen King, cite Lovecraft as one of their most important influences. His body of work has been referred to as "weird sci-fi," as it deals with strange lands and alien concepts. There's less of a focus on the supernatural (no ghosts or werewolves) and more on the primordial things that existed before human beings. Lovecraft spawned his own fictional universe, the "Cthulhu Mythos," which has seen contributions from authors such as August Derleth, Robert Bloch (of Psycho fame), and Brian Lumley. The Cthulhu Mythos is also the subject of one of my favorite pen-and-paper RPG's, Chaosium's Call of Cthulhu.
You'll also find piles of mythos-inspired films, most of which are the worst (best?) kind of B movie cheese. However, there was an excellent silent film adaptation of "The Call of Cthulhu" done in 2005 by The H.P. Lovecraft Historical Society. You can find a trailer for the movie here.
Enjoy your week. Have a fun Halloween, but stay safe.