2. The Black Swan Project
$500 million
We are continuing our list of biggest hidden treasures ever found in the world and with probably the biggest shipwreck, and while providing more than 17 tons of coins, it also brought many misunderstandings and hard times regarding claiming it, since it was discovered in an uncertain territory. However, it has been believed that the ship is Nuestra Senora de las Mercedes, sunk in 1804 and that it should belong to the Spanish government.
