This page will have a guide to the treasure map you find in Mariguana Island in Assassin's Creed IV Black Flag
Treasure Map Location[edit]
The treasure map itself can be found in a Cadaver in a cave around the west area of the island:
Mariguana Island is located at coordinates (884,541):
Treasure Map Tool[edit]
This is the treasure map you find:
Coordinates indicate (579,720).
Note that the treasure chest itself is NOT located on Mariguana Island (where you got the treasure map from), but rather on an island called Andreas Island at the coordinates listed on the map:
Dig Site Location[edit]
Sail to Andreas Island. It is recommended you first unlock the viewpoint there.
Set the marker to a small patch of land across from the south shore of Andreas Island:
Dig at the base of where the three palm trees are growing:
Dig the treasure out you should get 3,000 Reales and design plans for an elite harpoon:
