What lies hidden beneath Moscow? Subway palaces full of Soviet propaganda, Stalin's magnificent bunkers, centuries-old river systems. For decades, there have been repeated clues, cryptic statements and hints about Moscow's underground. The cinematic search for clues shows Stalin's command bunker and the government object GO-42, a headquarters of the Soviet military during the Cuban Missile Crisis in 1962. A residential house with potted plants and curtains was built over GO-42 as camouflage. Unt...