Ed Leedskalnin and the Coral Castle Code

The mystery of how Ed Leedskalnin (a 100 lb. man) was able to create the Castle, made out of massive coral stones, all by himself. Leedskalnin pushed the large stones into place in a method similar to how the pyramids and megalithic structures were constructed, and he passed the secret down in a set of clues, and a cryptic schematic.
* Audio is from Coast to Coast AM