San Jose Wreck

In 1968, the Spanish Navy launched a 64-gun three-mastered galleon called San Jose; its service was short-lived as the ship was sunk just off the Cartagena Coast of Colombia in 1968. The Navy ship was laden with numerous precious items like silver, gold, and emerald with a combined estimated value of $17 billion.
The wreck of the 19th-century ship was found by the Woods Hole Oceanographic Institution (WHOI) in 2015; the treasure’s ownership has been contended ever since with multiple countries claiming it belongs to them.