The Beale Papers
Want $40 million in buried gold, silver and jewels? All you have to do is solve an infamously “impossible” set of ciphertexts, one of which effectively provides that much-sought X on the map. The treasure was reputedly buried in Bedford County, Virginia by one Thomas Jefferson Beale, who entrusted his encrypted ciphertexts to a local innkeeper. After the innkeeper’s death, a friend who was given the papers spent twenty years trying to solve the ciphers, finally completing the one that describes the treasure. Despite many tries, the two others have never been solved.