A replica of a famous Greek statue adorns the front of the unusual home of architect and alchemist Humberto Pittamiglio.

The design of the Palacio Salvo has been described as "a lighthouse on top of a building."

This beautiful example of neoclassical architecture is one of Uruguay's most treasured cultural gems.

This historic fort overlooks Montevideo and appears on Uruguay’s coat of arms.

One of the most spectacular bridges in Spain spans a narrow chasm that divides the city of Ronda.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

A curious carving hides on a marble column in the Mosque-Cathedral of Córdoba.

Spain's unique Mosque-Cathedral has been a place of worship for both Muslims and Christians throughout its history.

An eerie collection of the surviving structures from a past celebration of the future.

The world's largest wooden structure.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

A hidden three-foot-wide house separates these two regal churches.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

A stunning 18th-century site where pilgrims ascend by a series of punishing stairs only to return via funicular.

Giant topiary dog once played a role in a terrorist bomb plot.

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

The facade of this 16th-century building is decorated with carvings of 300 seashells.

The Cathedral of Salamanca has a number of unusual carvings but none so surprising as a modern astronaut.

An ancient Egyptian temple in the middle of Madrid, Spain.

This small and often-overlooked museum holds some of Spain's finest artistic treasures.

The oldest restaurant in the world is this old-world Spanish eatery, still known for its suckling pig.

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

A stone slab in Madrid marks the point from which the distances of Spain's national roads are measured.