Madrid Madrid Madrid (, ) is the capital of Spain and the largest municipality in both the Community of Madrid and Spain as a whole. The city has almost 3.2 million inhabitants and a metropolitan area population of approximately 6.5 million. It is the third-largest city in the European Union (EU), smaller than only London and Berlin, and its monocentric metropolitan area is the third-largest in the EU, smaller only than those of London and Paris. The municipality covers . Madrid lies on the River Manzanares in the centre of both the country and the Community of Madrid (which comprises the
Guadarrama (river) (), which is one of the three regional parks within the Community of Madrid. The basin area is about Its main tributary is the Aulencia River, which flows entirely within the Community of Madrid and supplies water to the reservoir of Valmayor. Guadarrama (river) The Guadarrama is a river in Spain. A tributary of the Tagus, the longest river on the Iberian Peninsula, Guadarrama has its source in the Siete Peak, part of the Sierra de Guadarrama, in the Community of Madrid, in the central part of the country, at an altitude of . The Guadarrama flows from north to