Bunker-42 is a Cold War-era underground fortification located in downtown Moscow, Russia. Built in response to the United States' development of nuclear weapons, this facility was designed to protect Soviet leadership from potential nuclear attacks. The bunker features Dr. Strangelove-esque tours that reveal the interior of a structure once reserved for Stalin himself.
Its deep underground location, robust construction, and self-contained design made it one of the world's most secure buildings during one of the most tense periods in modern history.