Whether it's Indiana Jones, National Treasure, or the latest Dan Brown novel, popular culture has fallen in love with the idea of finding long-lost treasure, preferably in some elaborate underground vault forgotten by the passage of time. The hero typically has to find clues and solve puzzles in order to find out where the treasure is, or to open the hidden vault it's contained within.

Of course, those are just movies, but I'm wondering: are there some real-life examples of long-lost treasure being found? Are there any cases where the discoverer had to solve a series of puzzles or riddles in order to find or access the treasure?
