Decades later, the killer's identity remains a mystery.
From the Beast of Colombia to the Butcher of Rostov, these real-life nightmares have killed dozens of people.
The secret locked in her mansion attic was so vile, it inspired decades of ghost stories, crime books, and even a character on American Horror Story.
The twisted tales of these female serial killers are downright chilling.
In 1620, pilgrim John Billington crossed the Atlantic Ocean to become the first convicted murderer of the Plymouth colony.
These freaky urban legends will have you staying in on All Hallows' Eve.
From the Suffolk Strangler to Jack the Ripper, these British serial killers left a grisly trail of death in their wake.
In 1587, a group of men, women, and children settled on Roanoke Island ... only to vanish without a trace.
Three children left for a sunny day at a south Australian beach and were never heard from again.
Belle Gunness lured numerous suitors to her Indiana murder farm, where she killed them in cold blood and dumped their bodies in a hog pen.
Giulia Canella swore the photo depicted her long lost husband. Was it really him?
Can you crack the code to this baffling cold case?
When the park opened in the 1920s, its owner knew nothing of its bloody past.
Here there be dragons ... and crocs, and snakes, and murderers.
Beneath the bustling streets of Palermo is a massive monument to the dead where over 8,000 corpses line the catacomb walls.
In 1874, little Charley Ross followed two strangers into a buggy and vanished from the streets of Philadelphia, never to be seen again.
These creepy urban legends will have you double-locking your doors and sleeping with the lights on.
Get to know Gotham’s greatest ghosts, borough by borough.