
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.

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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.
The greatest hideout in fascist Italy's history -- the Monte Soratte bunker; it is built directly into a mountainside with security features even a Bond villain could only dream of.