Achilles: Legends Untold

You will encounter numerous Shrines of Hades throughout the game which allow you to assign your skill points, teleport to other unlocked shrines, and "Rest" which resets the game world and respawns all enemies. All of these will be marked with a "?" on the map until discovered, and then show an empty circle on the map once you've come close enough, and finally a colored in circle once you have unlocked them by interacting with them for the first time. Simply explore the entire map and you will easily find them all.