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.

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

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.

Paul Avery was a top reporter for the San Francisco Chronicle reporting on the infamous Zodiac killings. But after making a break in the case, the killer took to tormenting him with letters and cards.

In the early 14th century, Robert the Bruce became the King of Scots and ensured his country's independence after repulsing several English invasions.

Known as Snake Island, the viper-infested Ilha da Queimada Grande sits in the Atlantic Ocean about 90 miles off the coast of southeastern Brazil.

Jim Hutton and Freddie Mercury enjoyed seven love-filled years together before the latter died of AIDS-related complications on November 24, 1991.