Colombo family capo Greg Scarpa was so ruthless and deadly that he became known as the "Grim Reaper" — but he also spent 30 years secretly working as an FBI informant.

The heroic Scottish warrior who inspired Braveheart, William Wallace led his people in their rebellion against the English until his torturous death in 1305.

A child-sized doll dressed in a sailor's suit with alleged supernatural powers, Robert the Doll is now kept under lock and key at the Fort East Martello Museum in Key West, Florida.

The founders of the New England Society for Psychic Research, Ed And Lorraine Warren investigated America's most infamous cases of haunting and demonic possession.

A grisly quadruple homicide committed in the hills of Los Angeles' Laurel Canyon on July 1, 1981, the Wonderland Murders remain unsolved to this day.

Located off the coast of North Bimini island in the Bahamas, Bimini Road is a natural rock formation that looks like a cobblestone street on the ocean floor — leading some to believe that it once led to the sunken city of Atlantis.

Beginning in April 1997, Andrew Cunanan began a cross-country killing spree that left at least five people dead before he took his own life in Miami on July 23, 1997.

Measuring 218 feet long and weighing a quarter of a million pounds, the Spruce Goose was designed to transport military materiel across the Atlantic Ocean during World War II.

From battling the Dixie Mafia and the State Line Mob to avenging his wife's death, Buford Pusser left an astonishing mark on American history before dying in a mysterious car crash.

English mystic, novelist, mountaineer, and magician Aleister Crowley rejected his upper-class Christian upbringing and explored the darkest corners of occultism.

Though Saving Private Ryan was fictional, it was inspired by the true story of Frederick Niland, who was sent home after his brothers were killed in action.