Three underground shelters intended to protect the fascist dictator Benito Mussolini and his family, built beneath Villa Torlonia, his family's home in Rome after Italy entered the Second World War.

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.