No Stone Left Unturned Achievement
No Stone Left Unturned50
All documents, relics, and GPS caches found.
These are collectibles in the game. You will eventually earn skills that unlock these on your map. You can utilize fast travel after you have completed the game to grab all of them. Always use around areas as you go through them to find these glowing gold. You can put a waypoint on them on your map if you want as well, and they will be easier to find. There is one area (Cliffside Bunker) that cannot be fast traveled to but is still accessible by traveling on foot from the neighboring area (Shipwreck Beach). If all your fast travel locations say they're at 100% completion but the achievement hasn't popped yet, check there.