Albanian communist revolutionary and politician Enver Hoxha, who led his nation from 1944 until his death in 1985. He authorised the construction of hundreds of thousands of bunkers throughout the country, allowing his citizens to wage guerilla warfare against the enemy he was sure would come.

Infamous for his bunkers constructed during the Second World War and throughout the Cold War, Stalin's hideouts maintained a shroud of secrecy for decades. Here, new documents, along with a book banned in Russia, unveil the mysteries of the 'Man of Steel's' Soviet-era shelters.

In the center of Bucharest stands a monolith that hides a grand secret. Casa Poporlui, known abroad as the People's Palace, is the magnum opus of Romania's most bloodthirsty dictator, Nicolae Ceausescu. Immediately ballooning in both expense and scale, the palace becomes emblematic of Ceausescu's megalomania, resulting in billions wasted on a monolith so large and heavy that it sinks six millimeters into the ground every single year. But could the rumors of an extensive anti-atomic super bunker connected to the Spring Palace bunker through a city-wide network of tunnels below its surface be true?