So the title pretty much explains it all. If you find a cool, or interesting spot on the map, such as easter eggs or cool lookout spots, you can place a marker and name it. Now of course you could have a word document or IRL notepad, but i feel this could streamline the process. That way you do not forget where some hidden away cool spots are. Maybe there could be a map in-game in like the Ringfort where you could place the markers. Also another thing, maybe there is a box in the map that you could type coordinates in and your map marker goes there automatically. This might take away some of the realism, and challenge of moving the marker around to find spots.