The Treasure of Malacca Strait

In 1511 Portuguese vessel Flor de la Mar sank to the bottom of the sea. The ship had a run in with bad luck when it hit a reef off the coast of Sumatra during a storm. Not only did it take with it 400 people to the bottom of the sea, but also $3 billion worth of treasure. More than 60 tonnes of gold objects and 200 gem-filled chests with diamonds and rubies. All of which had been stolen from the sultan's palace in Malacca. The wreckage has never been found. Neither the treasure.