Vaults

Vaults are experimental fallout shelter in the United States of America created by Vault-Tec. In A Fallout Tale Cywren Caster was raised in one such vault. The Public was told they are for humanity's survival however they have a more sinister purpose.

True Purpose
Vaults were actually a sadistic way for the US government to perform un-ethical tests on its citizens, they never feared a nuclear war and all Vaults were to be shut on specific dates where tensions were high and the fears of nuclear war had risen.

Vault 101
This was the Vault Cywren Caster was raised in. She was forced out after her father left.