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

According to local legends in Chihuahua, Mexico, the bridal shop mannequin known as La Pascualita is actually the embalmed corpse of a real-life woman.

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.

After seven Braxton County, West Virginia residents reported seeing the Flatwoods Monster while investigating what looked like a UFO crash, local authorities scoured the scene — but they found nothing and reportedly "laughed off the reports as hysteria."

Known as the “Witch of Wall Street,” Hetty Green was one of the wealthiest people in the United States at the turn of the 20th century — but she was also one of the most miserly.

More than 50 years after the Isdal Woman's charred body was found in Norway’s “Ice Valley,” the authorities still don’t know who she was or how she died.

Though Freddie Mercury and Mary Austin never officially married, they were engaged for six years before he joined Queen and became a superstar.

Despite his heroic actions in World War I, U.S. Army soldier Henry Johnson didn't receive his due until 2015 — 86 years after he died in obscurity and poverty.