You may be familiar with doomsday preppers—people who, well, prepare themselves with everything they need to survive an anticipated apocalypse. This phenomenon isn't anything new.
The trend for fallout shelters, or bunkers, was popular in the '60s as a precautionary measure during the Cold War. Many people who built them created luxury living spaces to not only live comfortably in, but actually mimic an idealized outside world to promote mental wellbeing alongside basic survival if a nuclear war did break out.