6. Flor De La Mar
A 400-ton, 118-foot-long ship getting sunk is bound to have some goodies on it. It was involved in taking over Malacca and had the very important task of transporting all the loot, only for the ship to mysteriously sink near Sumatra. There are a bunch of rumors about what actually happened, namely the locals stealing the treasure or the captain sinking his own ship to line his pockets with copious amounts of jewelry. We’ll never know, but we do know that whatever was on that ship would be worth about 3 billion dollars today.