The Lost Dutchman's Gold Mine, located in the Superstition Mountains of Arizona, has been searched for by treasure hunters for over a century.
The mysterious death of outlaw Billy the Kid, who was shot dead by Sheriff Pat Garrett in 1881, has led to rumors that he may have faked his death and lived under a new identity.
The fate of the members of the Donner Party, a group of pioneers who became stranded in the Sierra Nevada mountains during the winter of 1846-1847 and resorted to cannibalism to survive, remains a haunting tale of survival in extreme conditions.
The identity of the infamous serial killer known as Jack the Ripper, who killed and mutilated several women in London in 1888, has never been definitively identified.
The unsolved murder of lawman and gambler John Wesley Hardin, who was shot in the back while playing poker in a Texas saloon in 1895, continues to intrigue historians and true crime enthusiasts.
The mysterious disappearance of the Roanoke colony in 1590, where all 117 inhabitants vanished without a trace, has long puzzled historians and archaeologists.
The legend of the Apache Kid, a notorious outlaw and Apache warrior who roamed the American Southwest in the late 19th century, remains shrouded in mystery and conflicting accounts.
The ghost town of Bodie, California, known for its preserved Wild West-era buildings, is rumored to be haunted by the ghosts of former residents and lawmen.
The unsolved murder of Wild Bill Hickok, who was shot dead while playing poker in Deadwood, South Dakota, in 1876, has led to speculation about the motives of his killer.
The legend of the Curse of the Little Bighorn, which suggests that anyone who takes a piece of the battlefield as a souvenir will be cursed with bad luck, has persisted since the 1876 battle in Montana.