American history is rife with violent tales: grisly murders, massacres, tragic accidents and suicides litter the historical landscape. These kind of tragedies are apt to give rise to tales of horrifying hauntings; American folklore is chock-full of ghosts and ghouls. Many of these supposed specters are associated with violence, tragedy or unsolved crimes. Some of the places associated with these ghost tales have become well-known across the nation—and some are all the more terrifying because there’s at least some grain of truth buried in those ghastly yarns.