Vault 17

Vault 17 is one of the Vault-Tec Vaults. The Vault's original purpose in the Vault Experiment and its location are unknown; aside from it being located somewhere in the Core Region, given that its inhabitants, including Lillian Marie Bowen, were taken prisoner by the Master's Army and made into super mutants its most likely that the vault is California based on the numbering system with locations. It is also possible that the vault inhabitants opened the vault and ventured out into the deserts until they were captured by the Master's Army.