Bunker-703 in Moscow, Russia
This atmospheric location on the surface is masked by an inconspicuous gray building. However, the true nature of this location is hidden more than 100 feet underground, similar in-depth to the Moscow underground/subway (Metro). This former bunker was constructed during the Cold War and wasn’t declassified until 2018.
The purpose of the bunker was to act as a protected storage facility for some of Russia’s most important foreign policy documents. It’s believed that around 120 tons of documentation, from treaties to top-secret materials were housed inside this bunker.
Although no longer used by the government, the bunker’s Cold War atmosphere still remains. To enter, visitors must venture down a set of stairs that take them underground. A local guide is available to conduct tours of the bunker and provide information about the facility’s history.