The candiru is a tiny parasitic fish that lives in South America — and supposedly has a penchant for swimming into the human penis.

The self-described prophet of the Branch Davidians cult, David Koresh led his followers into the Waco siege that left 76 of them dead in April 1993.

Known as the "Rotenburg Cannibal," Armin Meiwes killed and ate a willing victim named Bernd Brandes in 2001 before storing the leftovers for 20 months in a hidden freezer.

Gunned down in Medellín on December 2, 1993, "The King of Cocaine" allegedly was shot by Colombian police. But who really killed Pablo Escobar?

Bobby Dunbar vanished in 1912. His reappearance would lead to a custody battle, a possibly wrongly convicted man, and an incredible DNA test 90 years later.

After her husband died, firearms heiress Sarah Winchester built a "mystery house" — allegedly to escape the ghosts of people killed by Winchester rifles.

The Sentinelese have remained almost completely uncontacted on North Sentinel Island for nearly 60,000 years — and anyone who has tried to contact them has been met with violence.

Over the course of 40 years, Sarah Winchester had the so-called Winchester Mansion built in San Jose to her bizarre specifications — in order to appease the ghosts she thought were haunting her.

At 8 feet, 11 inches tall, Robert Pershing Wadlow was the tallest man in the world. But sadly, this "gentle giant" didn't live long.

After developing the V-2 rocket for the Nazis, Wernher von Braun was recruited by America at the end of World War II where he designed the spacecraft that took NASA to the moon in 1969.

After being lobotomized in 1941 at 23 years old, Rosemary Kennedy would spend the rest of her life institutionalized and isolated from her family.