The top-secret construction of a massive nuclear bunker remained concealed under a palatial West Virginia hotel for decades; experts reveal how this vast subterranean structure was one of the most closely guarded Cold War secrets in U.S. history.
探访了位于美国南达科他州、深埋地下约 60 米（200 英尺）的废弃导弹地堡，展示其被改造成可容纳多人的豪华避难社区, 它是旅游展示/概念性避难所，部分时段开放参观或短期体验，但不是传统意义上可常年预订的商用酒店；所谓"Apocalypse"是节目叙事标签，非正式品牌名...
