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
Allison Engine Testing Stands section. The most prominent features of the six open engine testing stands constructed in 1942 are the six reinforced concrete walls which separated the testing stands and provided a degree of protection against excessive noise or a propeller malfunction. Stands 1 to 4, numbered from the north, have been constructed on a raised concrete platform above ground level. Parts of its flooring have been raised higher above the general level of the platform. They indicate the positions where each engine stand and its respective control cabin would have stood. Most of the remaining evidence of the purpose and working life