Consider yourself warned: You may be surprised by some of the entries on this list. Here are the 25 best horror movies based on true stories.

Would you have guessed Nosferatu is a true story? Well, it is somewhat… and its relationship with being made is complex.

We rank the scariest supernatural monsters from the hit FX horror series American Horror Story, from Tate Langdon to The Afflicted.

Wes Craven's A Nightmare on Elm Street took some inspiration from a series of unexplained deaths of several young men in the 1970's.