A whimsical brother of the nearby Fallen Angel statue takes the falling part quite literally.

This magnificent market stands as a poignant symbol of the suffering caused by the Spanish Civil War.

This exhibition space designed to look like the skeleton of a whale is hidden underground.

One of the best examples of the modernist movement in Madrid.

The oldest vestiges of Madrid found here, have been incorporated into this new museum.

The best collection of Mudéjar building replicas gathered in a theme park in Olmedo.

The 2,000-year-old Roman columns are hidden within Barcelona's Gothic Quarter.

Barcelona's historic 19th-century sewers, whose foundations were laid in medieval times, are open to the public for exploring.