The team are excited when they locate the wreck of what may be one of the U-Boats they've been searching for. But, when they make the dive, they quickly realise things aren't quite what they assumed they'd be. During the Second World War, the Nazis looted everything they could get their hands on, including an estimated 600 tonnes of gold, thousands of pieces of artwork, and millions of priceless artefacts. While some of these items have been found, much of it remains missing. Treasure hunter Darrell Miklos believes some of these stolen riches were loaded into specially modified U-Boats that are currently lying at the bottom of the Caribbean Sea.