Dating back nearly 12,000 years, history's oldest man-made structures provide valuable insight into the first steps of civilization.

From Alexander the Great being buried alive to a Jameson heir paying to watch a girl be cannibalized, these true horror stories go way beyond Rated R.

Whether it's serial killers, cannibals, or disturbing beasts, the only thing more chilling than these scary photos from decades past are the terrifying stories behind them.

From the true story behind The Conjuring to the murders that inspired The Amityville Horror, these real ghost stories might make even the skeptics believe in the paranormal.

Carole Ann Boone met serial killer Ted Bundy in Washington in 1974 and became his wife six years later, while he was on trial for murder in Florida.

Discover the strangest photos ever taken in this collection of bizarre animals, unusual inventions, and extraordinary events that are completely one of a kind.

For decades, ufologists have claimed that extraterrestrials experiment on humans with the military's help inside a secret base underneath the Archuleta Mesa in Dulce, New Mexico.

On February 16, 1981, 19-year-old Arne Cheyenne Johnson stabbed his landlord Alan Bono to death with a pocketknife — then said the Devil made him do it.

What happened to Jimmy Hoffa, Madeleine McCann, and other victims of famous missing persons cases? Explore their mysterious disappearances and the leading theories behind them.

During a few days off from filming Furious 7, Paul Walker died at just 40 years old in a car crash in Santa Clarita, California on November 30, 2013.

From "Cannibal Holocaust" to "The Blair Witch Project," these movies were so extreme that countless people thought the onscreen carnage was real.