Gringotts Wizarding Bank is a large while marble buliding, staffted by Goblins, so don't even think of trying to rob it, if you know what's good for you. Knockturn Alley connects to Diagon Alley near the bank. The main floor of offices is on street level, but the vaults are miles below, accessable by a magic cart. It is rumored that the goblins keep dragons and Sphinx down there to gaurd the high security vaults.
