The former headquarters of history's oldest megacorporation.

A Dutch passageway's artistic, aquatic-themed makeover pays tribute to the capital city's famed waterways.

Atop this former dutch railway office sits an interstellar work of art.

The only Roman honorific column in Istanbul.

A marvel of Byzantine engineering under the streets of Istanbul.

On top of a resort town as old as the Bronze Age sits an incredible war memorial statue overlooking the beaches below.

A tiny church on a man-made island in the Adriatic.

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.

Walk into an underground archeological dig, the site of the Roman Forum that was once the center of Valencia.

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

An iconic and controversial ancient Iberian funerary urn with a hauntingly penetrating gaze.

This enigmatic artifact is a rare depiction of an ancient Iberian noblewoman.

This lucky bronze frog was gifted to Madrid by a casino.

This macabre masterpiece of a mural is one of Francisco Goya's "Black Paintings."

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

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

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

Step inside the first house designed by Catalan architect Antoni Gaudí, considered to be one of the first Art Nouveau buildings.

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.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

A once-secret library of Freemason history in Catalonia.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

This former Baroque palace on the historic Calle Montcada is a rare architectural gem and was once the meeting place of an aristocratic scholarly society.