Dive into Fortune: 11 Unbelievable (& Profitable) Underwater Discoveries That'll Leave You in Awe

5. The Project Black Swan

The Black Swan Project: Fortune from the Deep Estimated Value: $704.86 million* Year Lost: 1804 Year Found: 2007 Odyssey Marine Exploration’s “Black Swan Project” led to the recovery of gold and silver coins worth over $700 million. The find was linked to the Spanish frigate Nuestra Senora de las Mercedes, sunk by the British in 1804.

The Legal Saga of the Black Swan Treasure After a lengthy court battle, the coins were ordered back to Spain and are now displayed in a museum in Cartagena. The Spanish government pursued legal action against Odyssey, ultimately winning the case and a $1 million penalty for misconduct.