San Ignacio wreck

The San Ignacio Wreck was a shipwreck site located in the Dry Tortuga region of the Caribbean. Home to several sharks, it was explored by the pirate Edward Kenway during the early 18th century.

The area was first visited by Edward in January 1718, to recover medicines for the Pirate Republic of Nassau. While the ship had been carrying samples which had remained untouched in the wreckage, they had deteriorated extensively over the course of three years and were unusable by the time of their recovery.

When Edward later returned to the wreck of the ill-fated galleon San Ignacio, he managed to locate and loot several treasure chests that had sunk with the ship, gaining money and an upgrade plan for his own vessel, the Jackdaw.

Reference

 * Assassin's Creed IV: Black Flag