Vaults are one of the most beloved aspects of the Fallout franchise, and they always prove that Vault-Tec is up to no good. While some of Vault-Tech’s experiments in the Fallout series can be seen as quirky and bizarre, others are more downright diabolical in their creation, and provide situations and scenarios where not a single person should be subjected to. Some vaults are worse than the wasteland in Fallout, and there are many where players would certainly not want to be trapped.