Hogwarts is one of the world's finest wizarding schools, consisting of four houses. Muggles approach the castle, all they will see is a mouldering ruin with a sign warning them to keep out, that it's unsafe. Hogwarts is built in a forested area, directly next to a fairly large lake, in the highlands of Scotland. The main entrance to Hogwarts is a set of huge oak doors which face more or less toward the west.