A small museum displays some of the artifacts discovered during a subway station renovation.

Dedicated to a young woman who broke gender barriers at the University of Madrid.

This fountain was designed to honor the man who helped bring water to Barcelona.

These three pillboxes still remain as a witness of the Spanish Civil War in a park of Madrid.

This fascinating and poignant museum chronicles every imaginable aspect of Spanish colonialism in the Americas.

The unfinished final resting place of some of Spain's most prominent politicians.

King Carlos IV laid the first stone during construction of this chapel.

An exact replica of a colossal Olmec head sits atop a pyramid within a Madrid traffic circle.

An iconic photograph from the Spanish Civil War saved this shrapnel-scarred historic house from destruction.

This amazing abuela became a diehard metal fan late in life and an icon of Madrid's '80s rock scene.

This Art Nouveau gate still stands at the former entrance of a 20th-century Spanish writer's colony.

Part of the medieval watchtower is displayed in an otherwise ordinary parking garage.

Among the oldest structures in Madrid, these Moorish walls once guarded the medieval city of Mayrit.

In the fictional world of Kcymaerxthaere, celestial wonders marked a portal to a powerful route of travel at this site in Madrid, Spain.

The remains of this misplaced church were moved here stone by stone.

The remains of the second-oldest zoo in Europe can be seen within these library gardens.

This sculpture of a rider on horseback once crowned the tomb of an Iberian aristocrat.

Touching the iron railings of Tarragona's balcony to the Mediterranean is said to bring good luck.

One of Madrid's oldest trees, with a long and colorful history, resides in El Retiro Park.

A pair of gigantic baby heads greet passengers at Atocha Station.

This small museum tucked within a subway station holds pieces from Madrid's past.

Replicas of fossils unearthed during renovation work reveal how this area would have looked millions of years ago.

One of the oldest used bookstores in the U.S. has been selling antiquarian treasures since 1825.

Designed to mark the geographical center of France.