America's greatest unsolved code leads to a $60million treasure - but no one has been able to crack it for 180 years.
The mystery of the Beale ciphers begins in 1885, when a small pamphlet with three ciphertexts was published.
A cipher is an unreadable, encrypted message that needs a key to be read.
The pamphlet details how a man named Thomas J. Beale, a Virginia native, had buried treasure at an unknown location.
In the spring of 1822, Beale left a locked iron box that contained 'papers of value and importance' to a local innkeeper named Robert Morriss.
