In their quest for world domination, the Nazis built some of the biggest and deadliest pieces of military hardware and malevolent technology in history. They created huge terror machines, hi-tech superguns and some of the original weapons of mass destruction in order to control a nation, conquer a continent and win the war. With total European military supremacy as their driving force, the Germans build defensive bunkers and impenetrable submarine pens. Over six mesmerising episodes, Nazi Megastructures uncovers the hidden remains of Hitler’s most ambitious megastructures, telling the stories of the engineering geniuses who designed them and revealing how these structures sparked a technological revolution that changed warfare forever. Produced by National Geographic.