It’d actually be quite hard to bury the sort of treasure that pirates were after. The idea of pirates hunting for gold and jewels is bit of a myth, as it would just weigh down the ship.
The museum displays a variety of pirate artifacts, including the world's oldest "Wanted" poster, the world's only pirate treasure chest ... aboard a replica pirate ship with a helm and cannons.
You'll know the treasure chest from the weird purple swords logo above it, and by opening this chest, you'll acquire the crafting recipe for the Corsair's Compass, and begin the Pirate King's ...