Guided missiles, the Wasserfall, and the war-changing V2 were dreamed up and tested in Peenemunde, a German seaside village suddenly taken over by Nazi rocket scientists.
As the Red Army approaches a forest in Poland at the end of the war, they stumble upon a massive complex containing over a thousand structures across 25 sq km. How did the Germans keep this colossal base secret from allied intelligence?
Hidden in a remote mountainous forest is a structure nicknamed the Fly Trap or Hitler's Stonehenge. Researchers still have no definitive idea what it is.
Germany's preparations for WW2 began years before 1939. Under various guises, Germany began work on what would become their most technologically advanced front.
In Poland lies a forgotten Nazi complex which could have sheltered up to 27,244 people from Allied bombs, the purpose of which largely remains a mystery.
Why would the Nazi's pour so many resources into this strategically insignificant island, and hold onto it at all costs even at the end of the war when the end was surely near? What dark secrets lie buried in the tunnels, bunkers and watchtowers dotting Guernsey?
A secret weapons program that could have ended badly for the allies. In the heart of Austria, a bunker and network of tunnels were discovered based on a long lost 1944 German report that indicated what the Nazis were up to.