Salem Witches' and Wizards' Institute

The Salem Witches' and Wizards' Institute is a secret school for witches and wizards in the United States. The school is located in Salem, Massachusitts. A special charm was placed over the school so that it would apear invisible to muggles. The only way to see it is to walk through the invisibility barrir that the charm creates. Outside the barrier the schools appears to be a bunch of factories.