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.

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

Due to two centuries of inbreeding, the Habsburg family was ravaged by extreme physical deformities, including impotence, bowed legs, and the infamous Habsburg jaw.

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.

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.

The father of Adolf Hitler, Alois Hitler was a domineering, unforgiving husband who often beat his wife and his children — leading his son to despise him.

Thanks to a strong constitution and some liquid courage, baker Charles Joughin survived nearly three hours in the frigid North Atlantic after the Titanic sank.

The devoted mother of Adolf Hitler, Klara Hitler died of cancer in December 1907 while in the care of a Jewish doctor, leading some to speculate that this tragedy set the future dictator on his deadly path.

The fortress was specially constructed on a foggy mountainside to keep Escobar's enemies out — and not the cocaine kingpin in.

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.

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.