2. In October 1941, during World War II, the Soviet authorities were ready to destroy the subway. They even issued a special decree on developing a special plan to destroy it, but later the order was canceled.
3. In the 1920s, German company Siemens-Bauunion applied to construct the subway, but the application was refused.
4. Until the early 1990s, there were trash bins in the subway. However, they were later removed as a measure to protect against terrorism.
5. Automatic ticket barriers were installed in the subway in 1958. Before that tickets were checked by collectors.
6. There are fountains with drinking water at the metro stations. But no one knows about them. They are hidden from passengers.
7. Cleaning staff uses wet sawdust while cleaning metro stations, because it is good at gathering dirt and dust.
8. Some stray dogs use the subway to travel from one part of the city to another.
9. A male voice announces the names of the stations in the trains moving to the center of the city, and a female voice can be heard in the trains driving out of the center. The similar logic applies to the Koltsevaya Line: a male voice announces stations as the train moves in a clockwise direction, while a female voice can be heard in the trains moving counter-clockwise.
10. The design of the Moscow metro stations contains ancient fossils. You can see mollusks, sea lilies and even sea urchins on the columns and the walls.