As the Soviet Army pushes the Nazis out of Poland, they discover a massive city of over a thousand buildings covering ten square miles that was unknown to the Allies, and using the latest science, experts reveal how Hitler was able to keep this sinister place hidden for so long. D.A.G. Fabrik Bromberg was a secret German explosives factory hidden in the Bydgoszcz Forest, providing a third of the munitions for Eastern Front.

An abandoned eerie structure in France could have doomed the Allies in World War II, and new discoveries at this mysterious site reveal the truth behind top-secret Nazi plans to unleash apocalyptic destruction.

When a secret bunker and a vast network of tunnels are discovered after World War II, experts use cutting-edge tech to uncover if the high levels of radiation in the area could be connected to a classified Nazi nuclear program.

A strange, abandoned mansion on a remote island is central to countless conspiracy theories, and new discoveries reveal if this eerie site was a secret Nazi base intended for a sinister mission.

When a top-secret Nazi base is discovered in France decades after the war ends, experts use cutting-edge tech to reveal the secrets of this compound; what they find could change everything we know about D-Day and the last stand of the Nazi regime.

New discoveries on the Channel Island of Guernsey, strangely fortified by the Nazis, reveal the terrifying truth behind Hitler's secret plan to win World War II at all costs, and using the latest science and tech, experts investigate what really happened here.