Treasure maps are interesting. You get them from gathering. They give you an image of where the treasure should be located, you figure out where it is and scan for it. Once you find it, you beat a boss to get the treasure. All of it is open world, you can check out the A Realm Awoken trailer to get an idea of it.

If it were expanded upon, it could be epic. Imagine competition treasure maps using the Alliance system. Three different parties each have their own piece of the map, they bring it together to begin a race for the treasure. Or maybe it can be cooperative as opposed to competitive. Either way, it can be AWESOME.