An ancient Roman theatre restored to its former glory in the Spanish city of Cartegena.

Of the many chalices in the running for the Holy Grail, this one in Valencia Cathedral sure looks the part.

With a facade that measures just 107 centimeters, this five-story building is one of the skinniest in Europe.

This amazing example of Valencian Art Nouveau looks more like a cathedral than a public market.

This massive fiberglass Gulliver turns every visitor into a Lilliputian.

A place steeped in history that may be best known as the set of a 1960 film.

The blowhole bursts spectacularly right next to the buildings in a medieval seaside town.

An open-air "garden" of mural art that changes weekly.

An early 20th-century bullring converted into a modern shopping center.

This colorful statue welcomes visitors to a Barcelona park.

A former steam-powered mill from the 1800s is now an industrial park with a giant steel dragon slide.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

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

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

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

Giant eggs, walls of bread, and nightmare surreality mark the largest collection of works by Salvador Dalí.

A site where “the ravages of the war are more striking…than any other place in contemporary Spain.”

A charming Spanish village sits atop this natural limestone overpass.

Medieval ruins nestled within a breathtaking swath of Spanish nature.

Once the grandest synagogue in medieval Spain, it now stands as a memorial of the 15th-century Jewish exile.

A massive birdcage in this royal, 18th-century garden has sparked a local controversy.

A collection of riverboats of the Spanish royal family in a quaint museum.

This 18th-century pond is one of the main attractions in the Jardín del Príncipe in Aranjuez.