Duplicated Series

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.

New discoveries at an abandoned structure in France reveal top-secret Nazi plans to unleash apocalyptic destruction.

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 a strange fortified island 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.

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.

As the Soviet Army pushes the Nazis out of Poland, they discover a massive city of over a thousand buildings that was unknown to the Allies, and using the latest science, experts reveal .. show full overview