CARLOS DOMINGUEZ / SCIENCE PHOTO LIBRARY CARLOS DOMINGUEZ / SCIENCE PHOTO LIBRARY
Skyscrapers in the CTBA (Cuatro Torres Business Area) in Madrid, Spain. The one in the foreground is the Torre Caja Madrid (250 metres). Partially seen behind it is the Torre PwC (236 metres, formerly the Torre Sacyr Vallehermoso). The two skyscrapers in the background at lower right are the Torre de Cristal (left, 249.5 metres) and the Torre Espacio (right, 224.5 metres). Collectively they are known as Cuatro Torres (the Four Towers), and the business area is named after them. They are the tallest skyscrapers in Madrid, and were completed between 2007 and 2008. Photographed in 2011.
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