
Infamous for the bunkers constructed during World War II and throughout the Cold War, Stalin's hideouts have maintained a shroud of secrecy for decades and are now seen for the first time.

Hitler's last secret is revealed to be a sprawling underground headquarters in a remote region of Poland, at Ksiaz Castle; complete with a network of underground complexes in the Owl Mountains.

Infamous for the bunkers constructed during World War II and throughout the Cold War, Stalin's hideouts have maintained a shroud of secrecy for decades and are now seen for the first time.