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Opened in 1935 with one 11-kilometer line and 13 stations, the Moscow Metro was the first underground railway system in the Soviet Union. As of 2018, the Moscow Metro excluding the Moscow Central Circle and Moscow Monorail has 214 stations and its route length is 364.9 km, making it the sixth longest in the world. The system is mostly underground, with the deepest section 84 meters underground at the Park Pobedy station, one of the world’s deepest.