Tom and Eileen Lonergan went on a group scuba diving trip to the Coral Sea in January 1998 — before they were accidentally abandoned and never seen again.

In July 1951, Mary Reeser mysteriously burned into a pile of ashes in her Florida home, but the apartment around her suffered almost no damage, leading to theories that she had spontaneously combusted.

An infamous punishment used to maintain order at sea in the 17th and 18th centuries, keelhauling was when sailors would be dragged under ships as punishment.

Colleen Stan became known as the "girl in the box" after she was held prisoner by Cameron and Janice Hooker inside their California home between 1977 and 1984.

Christopher Scarver didn't like Jeffrey Dahmer's crimes. So on November 28, 1994, in Columbia Correctional Institution, he did something about it.

Operation Anthropoid, a secret plan to kill Reinhard Heydrich in 1942, was the only successful assassination of a top Nazi officer during World War II.

Literally translating to "rotting cheese," casu marzu is a traditional Sardinian pecorino made with sheep's milk — and filled with live maggots.

Tara Calico disappeared in Belen, New Mexico on September 20, 1988. A year later, two Polaroids of a tied-up woman were discovered in Florida — was it her?

Known for both her beauty and her personal demons, Edie Sedgwick shot to fame as an actress with Andy Warhol's "Superstars" before dying at 28 in 1971.

When no one in the United States would train her, Bessie Coleman enrolled in a prestigious flight school in France — and became a fearless stunt pilot known across the world.

Operation Mockingbird was an alleged CIA project that recruited journalists to write fake stories promoting government ideas while dispelling communist ones.