Wikipedia:Picture of the day/May 15, 2005
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The Madrid metro is the large metro system serving Madrid, the capital of Spain. It is one of the largest metro systems in the world, despite Madrid having a population of only four million. The metro opened in 1919 under the direction of the Compañía de Metro Alfonso XIII. Metro stations served as air raid shelters during the Spanish Civil War. Image credit: Montrealais |
