13 Abandoned Cold War Bunkers Hiding Incredible Secrets

8. Object 17/5001, near Prenden, Germany: East Germany's Doomsday HQ

One of the largest and most sophisticated bunkers in the Eastern Bloc outside the USSR, this sprawling complex was built to house the East German political and military leadership (around 400 people) in case of nuclear war. Known colloquially as the "Honecker Bunker," its sheer scale, depth, advanced (for its time) technology, and extensive self-sufficiency systems were kept highly secret. Now partially accessible for tours, it reveals the extent of the GDR's preparations for Armageddon and the resources poured into protecting the communist elite.