Description: How the world's first metro system was built - Christian Wolmar, Why The London Underground Makes Itself Hotter Every Year, Switzerland's Planning An Underground Freight System, The Underground Commute of the Future
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Underground most commonly refers to:
Underground may also refer to:
Underground is a 1941 war film about the German Nazi Resistance opposing the Nazis in World War II . Jeffrey Lynn and Philip Dorn play two brothers initially on opposite sides.