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

Originally planted by the ancient Carthaginians, this sprawling palm grove is one of the largest in the world.

The grotto where Saint Ignatius of Loyola lived as a hermit for nearly a year.

On the wall of this medieval walkway, a symbol of the Spanish Inquisition.

This stop on the Camino de Santiago stands high above the underwater ruins of a medieval town.

A curious memento mori hangs in the magnificent Cathedral of Segovia.

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

Living towers made of people that are now recognized by UNESCO.

The most elaborate of 12 medieval arched doorways to the old city of Burgos.

Long tunnels run under the ancient chariot racing circuit to the tower.

This enormous censer uses a pulley system installed over 400 years ago.

One of Antoni Gaudí’s earliest buildings, built between 1886 and 1890 for the industrialist Eusebi Güell.

For decades, Puerta del Sol has been illuminated by a giant, guitar-wielding bottle of sherry.

Saint Joseph was said to heal the deaf and blind, but it was a much smaller miracle that got him canonized.

An accidental trick of light casts the perfect shadow of a pilgrim of the Camino de Santiago against the cathedral wall.

This colorful statue welcomes visitors to a Barcelona park.

This influential Renaissance-era library was once the haunt of kings and monks.

The Roman city was the birthplace of various emperors and is home to one of the empire's most impressive architectural feats.

This home designed for chocolate magnate Antoni Amatller is an exquisite treasure-box of Catalan Modernism.

The ruins of an ancient stadium that hosted gripping chariot and horse races.

A huge cathedral single-handedly constructed by one eccentric monk.

Two towns are linked by an engineering marvel masquerading as a boring suspension bridge.

This underground church is topped with a 500-foot cross that is seen by many as a beacon of fascist hubris.

This stunning iron gate designed by Modernist architect Antoni Gaudí is filled with mythic symbolism.