Vault 33

Vault 33 is a Vault-Tec Vault in what was once Santa Monica in Los Angeles, California, located next to the Santa Monica Pier.

Vault 33 is notable in that it is part of a network of Vaults, being connected directly to Vaults 31 and 32. To prevent the spread of threats, the three Vaults are isolated from one another except for trade every three years, known as the Triennial Trade, and emergencies where the Vaults require each other's aid.