Legend: Pirate treasure? English, French or Spanish military plunder? The secret Rosicrucian works of Sir Francis Bacon and therefore also the possible original missing folios of Shakespeare? Or perhaps the greatest sacred antiquities lost to history, such as the Ark of the Covenant, the Holy Grail, the Spear of Longinus or the menorah from King Solomon's temple? Or maybe it's all just natural geological processes forming a sinkhole, plain and simple? These are just some of the theories of what could be down in the infamous and mysterious "Money Pit" on Oak Island, Nova Scotia -- thought by many to be one of the greatest archeological mysteries of North America, and possibly the world.