Uncovering and examining hidden structures built by the Nazis.
Series Selector for Secret Nazi Bases
All episodes for series 1 of Secret Nazi Bases
Recently-excavated trenches, bunkers, barracks and gun encasements near Pointe du Hoc.
The Spanish island of Villa Winter, suspected of being a port for German U-boats.
One of the largest Nazi bunkers ever constructed, outside the French town of Watten.
A massive complex containing more than 1,000 structures in Poland.
A secret weapons program in Austria that could have ended badly for the Allies.