Moscow Metro-2

The Russian government has neither confirmed nor denied the existence of this underground metro system. It was supposedly constructed during Joseph Stalin’s time, and parallels the current rail system. Allegedly code-named D-6 by the KGB, it is rumored to connect the Kremlin with the Federal Security Service headquarters, the government airport, and an underground town at Ramenki. If it exists, it could still be operated by the Main Directorate of Special Programs and Ministry of Defense. In 1994, an urban exploration group, the Diggers of the Underground Planet, proclaimed to have discovered the underground entrance to the rail system. Then ten years later, former Soviet adviser Vladimir Shevchenko finally confirmed the facility’s existence.