Caption

Gate of Europe Towers and obelisk, Madrid, Spain. The Puerta de Europa (Gate of Europe) Towers, the world's first inclined skyscrapers, are 114 metres high. Built between 1989 and 1996, they were designed by US architects Philip Johnson and John Burgee. Originally the KIO Towers, they are now owned by Bankia and Realia. The column is the Obelisco de la Caja (Caja Madrid Obelisk) on the Plaza de Castilla. Built from July 2008 and opened in December 2009, it is 92 metres tall. Designed by the architect and sculptor Santiago Calatrava, it marks the 300th anniversary of the founding of Madrid. Photographed in 2011.