Secret Nazi Bases

Uncovering and examining hidden structures built by the Nazis, from tunnels to towers, artillery sites, resistance nests and communication centers.

As Hitler's shadow engulfs Europe, castles across the continent fall under Nazi control; once symbols of nobility and culture, they are transformed to serve the ambitions of the Third Reich.

In 1942, the Allies are losing the air war; a secret technology is facilitating a Blitz by the Luftwaffe; desperate for answers, British intelligence sets sights on an installation in France.

As allied bombing raids escalate, a big concrete dome rises from the French countryside, reportedly concealing a crucial component of Hitler's plan.

After the Allied landing in Normandy, France falls city after city. An island fortress off the coast becomes the stage for an act of Nazi defiance. Its commanders vow to hold it to the last man.

Deep in the forests of East Prussia, a sprawling Nazi complex becomes a nerve centre; one of the most secure facilities in the Nazi empire, how does it become the site of a plot against the Führer?