PARIS, DEC 4: Underground train inside a metro station, December 4, 2012 in Paris. Paris Metro is the 2nd largest underground system worldwide by number of stations (300), stock photo

Stock image of 'PARIS, DEC 4: Underground train inside a metro station, December 4, 2012 in Paris. Paris Metro is the 2nd largest underground system worldwide by number of stations (300).'
Published: March 16, 2014
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