The Marauder's Map was a magical document that revealed all of Hogwarts School of Witchcraft and Wizardry. Not only did it show every classroom, every hallway, and every corner of the castle, but it also showed every inch of the grounds, as well as all the secret passages that were hidden within its walls and the location of every person in the grounds, portrayed by a dot. It was also capable of accurately identifying each person, and was not fooled by animagi, Polyjuice Potions, or…
