Some American mysteries have generated theories for decades, but the surviving evidence still isn’t enough to establish exactly what happened.
1. Amelia Earhart’s Disappearance
In 1937, Amelia Earhart disappeared while attempting to fly around the world.
Despite extensive searches and numerous theories, her aircraft and definitive evidence of her fate have never been conclusively found. (archive.ncarb.org)
2. The Lost Colony of Roanoke
More than 100 colonists disappeared from the Roanoke settlement in the late 1500s.
When a later expedition returned, the settlement had been abandoned. The word “CROATOAN” was found carved at the site, but historians still cannot establish exactly what happened to the colonists.
3. The Fate of the Mary Celeste’s American Captain
The Mary Celeste was discovered abandoned in the Atlantic in 1872, despite the ship remaining largely seaworthy.
Its American captain, Benjamin Briggs, his family, and crew were never found. Theories range from a navigational mistake to problems involving the ship’s cargo, but no explanation has been proven.
4. The Disappearance of Judge Joseph Crater
New York judge Joseph Crater vanished in 1930 after leaving a restaurant in Manhattan.
Despite one of the largest investigations of its era, investigators never established what happened to him. His disappearance became one of America’s most famous unsolved cases.
5. The Fate of the USS Cyclops
The USS Cyclops disappeared in 1918 while carrying more than 300 people.
No confirmed wreckage was ever located, and no distress call was received. The ship may have suffered mechanical or structural problems, but its exact fate remains unknown.
6. The Kincaid Cave Story
In 1909, newspapers reported that an explorer named G. E. Kincaid had discovered an enormous underground complex in the Grand Canyon.
The story described Egyptian-style artifacts and a Smithsonian connection, but no reliable archaeological evidence has confirmed the discovery. It remains a historical mystery—but also a reminder that an intriguing newspaper story is not necessarily evidence.
