Plunge into Wealth: 11 Stunning Underwater Finds That Amaze & Profit

5. The Project Black Swan

The Black Swan Project: Riches from the Abyss Estimated Value: $704.86 million* Year Lost: 1804 Year Found: 2007 Odyssey Marine Exploration’s “Black Swan Project” unearthed gold and silver coins worth over $700 million. The haul traced back to the Spanish frigate Nuestra Senora de las Mercedes, sunk by British forces in 1804.

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The Legal Battle of the Black Swan Treasure After a fierce legal fight, the coins were returned to Spain and now shine in a Cartagena museum. Spain sued Odyssey, winning the case and imposing a $1 million fine for unethical conduct.