Gringotts Wizarding Bank.

Gringotts is the only known bank of the wizarding world and it is operated primarily by goblins. A snowy white building, near the intersection of Knockturn Alley and Diagon Alley, Gringotts towers over all neighbouring shops. Customers pass through a set of bronze doors and then silver ones before entering the lobby. The main floor is paved with marble and has long counters stretching along its length. Within, Wizards and witches keep their money and other valuables in vaults that are protected by very complex and strong security measures. The vaults extend for miles under London and are accessible through rough stone passageways and then by means of magic carts that travel speedily along their tracks. Gringotts also offers Muggle-Wizarding currency exchange. Higher security vaults may have various enchantments upon the doors. For example, the door to Vault 713 needs to be stroked by a certified Gringotts goblin, which causes it to melt away. If anyone but a Gringotts goblin touches the door, the person will be sucked into the vault, which is checked for trapped thieves about once every 10 years.