Find a buried treasure.
Treasure maps are scattered around the Caribbean on corpses, and will show up as collectibles indicated by a question mark when looking at what various locations have. Once you have a treasure map, you can access it by pressing until the maps are selected, and then press to open the selected map. You can change which map you are looking at by pressing and . Maps will have coordinates on the bottom right corner, so your first step is to travel to those coordinates. The map will have a rough sketch of part of that location with a red X on it, and you will need to locate the treasure at the X by using landmarks drawn on the map. When you approach the spot, you will be prompted to press to dig up the treasure.