Hogwarts School of Witchcraft and Wizardry is a boarding school of magic. The castle is in the mountains near a loch. The precise location can never be uncovered as the school is hidden by the most powerful spells possible, and is Unplottable. Spells protecting the castle include anti-Apparition and Muggle-repelling charms, which make the castle appear as an old ruin with a sign that says 'Danger, Keep Out.' These spells may be temporarily lifted by the sitting Headmaster. Most electronic devices do not work on Hogwarts grounds There are approximately a thousand students attending Hogwarts at any given time.
On the grounds of the school lives a large Womping Willow tree that attacks recklessly. In the forest beyond the grounds, in the Forbidden Forest, lives a number of wild beasts, including a giant spider called Aragog. Topher was transported to the grounds after the events of the Breaking Tower and trained by a Mysterious Cloaked Man.