The chaotic studio of one of the 20th century's most important artists has been preserved down to the dust.

This statue celebrating everyday life in Dublin has a few unsavory nicknames.

This neon landmark has been posing this deadpan question to follicly-challenged Dubliners for over 50 years.

A statue in the center of Dublin dedicated to one of their favorite sons of rock & roll.

These slanted cubic abodes are a creative if odd solution to a zoning pickle.

A bridge that has seen many reiterations over its lifetime.

Old ships and machinery fill a historic harbor in the city that's home to Europe's largest port.

Four giant movable street lights decorate this modern Rotterdam square.

Rotterdammers' dirty minds gave this Santa a dirty nickname and cursed it to a life of wandering.

A nearly 25-foot concrete sculpture of Sylvette, Picasso's muse.

This unattributed sculpture in Amsterdam is hiding in plain sight.

This towering church is home to a world-famous organ and a treasure trove of medieval art.

A beautifully eclectic mix of architectural styles.

Three connected pink triangles memorialize persecuted gays and lesbians throughout history.

An automaton perched above an classic clock and watch store

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

A statue commemorating a beloved stray dog who was adopted by the entire neighborhood where he lived.

Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.

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

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

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

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

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

Hundreds of stone stairs and a winding medieval bridge connect this haunting Spanish island to the mainland.