On August 22, 1972, John Wojtowicz tried to rob a Brooklyn bank to pay for his lover's gender-reassignment surgery — before the heist went terribly wrong.

During the Black Hawk Down incident that sparked the Battle of Mogadishu, 18 American soldiers were killed by Somali forces between October 3 and 4, 1993.

Thanks to oil deposits found on their land, the Osage Native Americans became some of the wealthiest people in the United States by the 1920s — which put an enormous target on their backs.

In September 1982, 12-year-old Johnny Gosch disappeared while delivering newspapers in West Des Moines. One night fifteen years later, his mother claims he visited her and told her he was the victim of a pedophile ring.

First discovered by divers in 1901, the 2,000-year-old Antikythera mechanism used tiny gears to track heavenly bodies with such precision that it's called history's oldest computer.

Known as the "Sleeping Beauty" of Mount Everest, American mountaineer Francys Arsentiev died tragically atop Earth's highest peak on May 24, 1998.

Blanche Monnier's prominent French family was dismayed she fell in love with a commoner. So they confined her to a tiny, lightless room for over two decades.

Paul Bernardo and Karla Homolka looked like normal newlyweds, but the Ken and Babie Killers murdered three people and raped at least 14 in late 1980s and early '90s Ontario.

Between 1977 and 1984, Cameron and Janice Hooker kept Colleen Stan inside a wooden box under their bed, only taking her out to torture her.

Although Valak is depicted as a habit-wearing spirit, the real demon appears as a child riding a two-headed dragon — at least according to a 17th-century demon-hunting manual.