Secret Nazi Bases

Uncovering hidden structures built by the Nazis. The first edition focuses on Guernsey, which Hitler occupied and fortified over the course of five years.

A mile-and-a half of recently-excavated trenches, bunkers, barracks, and gun encasements near Pointe du Hoc, which tell a new story of D-Day.

The Spanish island of Villa Winter, which was suspected of being a port for German U-boats and part of a larger plan to invade the United States.

One of the largest Nazi bunkers ever constructed, outside the French town of Watten, a missile facility with storage for 108 missiles and two launch pads.

As the Red Army approached a forest in Poland toward the end of the war, they stumbled upon a complex containing more than 1,000 structures across 25sqkm.

A secret weapons program in the heart of Austria that could have ended badly for the Allies - and may have indicated nuclear plans being concocted by Hitler.