A 23-pound, solid-gold cauldron was found at the bottom of a Bavarian lake in 2001. Thought to be a 2,000-year-old Celtic treasure, one expert valued it at 1.4 billion dollars...until it was proven to be a fake. Yet the origins of this forgery prove to be just as historically significant. Discover the astonishing secrets behind this recently found artifact. Our investigation uncovers a story of intrigue, shady deals, and a plot by Nazi leader Heinrich Himmler to create a sinister Camelot inside "The Nazi Temple of Doom," Germany's Wewelsburg Castle.