A hidden shopping street in London where witches and wizards buy wands, robes, books and other magical supplies.
The wizarding bank in Diagon Alley, run by goblins, with vaults deep underground.
The British school of witchcraft and wizardry, set in a hidden castle in Scotland, where young witches and wizards study for seven years.
A hidden room at Hogwarts that appears only when someone truly needs it, furnished with whatever they need.