One of the world's most famous museums, the Museo del Prado offers a wealth of information on art and the museum itself. The most engaging section of the site offers images from the collection along with details about the work and the artist. A new selection if chosen each month, and you can browse the archived works as well.
Then known as the Royal Museum of Art and Sculpture, the Prado opened on Nov. 19, 1819. You'll learn this and other facts in the history section of the site, which covers the buildings, the surrounding area and the collections.