Alhambra

"The Alhambra..is a palace and fortress complex of the Moorish monarchs of Granada, in southern Spain.."

http://en.wikipedia.org/wiki/Alhambra

Cathedral of Santiago de Compostela

"Santiago de Compostela Cathedral is situated in Santiago de Compostela in Galicia, Spain. The cathedral is the reputed burial-place of Saint James the Great, one of the apostles of Jesus Christ. It is the destination of the Way of St. James.."

http://en.wikipedia.org/wiki/Cathedral_of_Santiago_de_Compostela

El Escorial

"El Escorial is austere, even forbidding, in its outward appearance, seemingly more like a fortress than a monastery or palace. It takes the form of a gigantic quadrangle, approximately 224 metres by 153 metres, which encloses a series of intersecting passageways and courtyards and chambers."

http://en.wikipedia.org/wiki/El_Escorial

Prado Museum

"The Museo del Prado is a museum and art gallery located in Madrid; the capital of Spain. It features one of the world's finest collections of European art, from the 12th century through the early 19th century. Founded as a museum of paintings and sculpture, it also contains important collections of more than 5,000 drawings, 2,000 prints, 1,000 coins and medals, and almost 2,000 decorative objects and works of art. Sculpture is represented by more than 700 works and by a smaller number of sculptural fragments."

http://en.wikipedia.org/wiki/Prado_Museum

City of Arts and Sciences

"Designed by Valencian architect Santiago Calatrava and started in July 1996, it is an impressive example of modern architecture."

http://en.wikipedia.org/wiki/City_of_Arts_and_Sciences

Royal Palace of Madrid

"The palace is the largest in Western Europe.. It is richly decorated by artists such as Velzquez, Tiepolo, Mengs, Gasparini, Juan de Flandes, Caravaggio, and Goya. Several royal collections of great historical importance are kept at the palace, including the Royal Armoury and its weapons dating back to the 13th century, and the world's only complete Stradivarius string quintet, as well as collections of tapestry, porcelain, furniture, and other objets d'art of great historical importance."

http://en.wikipedia.org/wiki/Royal_Palace_of_Madrid

The Sagrada Familia

"La Sagrada Famlia (Catalan, 'The Holy Family') is a large Roman Catholic basilica under construction in Barcelona, Catalonia, Spain. Its formal title is Temple Expiatori de la Sagrada Famlia. Antoni Gaud worked on the project for over 40 years, devoting the last 15 years of his life entirely to this endeavour."

http://en.wikipedia.org/wiki/Sagrada_Fam%C3%ADlia