A UFO-shaped event building originally intended to be a science museum showcasing the future.

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

A highly-criticized monument in Budapest has become the site of a makeshift Holocaust memorial.

A triumphant marble and bronze fountain depicting a 15th-century Hungarian king and his hunting party.

From cartoon characters to tiny tanks, a guerilla sculptor's little bronze statues are hidden throughout the city of Budapest.

Tucked away near more famous landmarks lies a statue meant to symbolize the confluence and continuing development of human culture.

Some of the greatest minds in the history of Hungarian art and science converged in this café.

This Budapest bar allows drinkers to leave their mark on the walls, floor, and even ceiling.

One of the oldest wine cellars in Germany is now a restaurant beneath Bremen's town hall.

Böttcherstraße's bells, extolling Nordic virtues and the great conquerors of the world.

A stunning gilt bronze relief denounced by Hitler as "degenerate art"—even though it was dedicated to the Nazi leader.

A spitting ode to a German serial killer.

A six-story, asymmetrical tower filled to the brim with scientific experiments.

The architect of this fanciful complex called it an "oasis for humanity and nature in a sea of rational houses."

A sprawling Baroque park with 300-year-old hydro-pneumatic waterworks.

Renowned mathematician and physicist Carl Friedrich Gauss once worked at this observatory.

The real life town from the Pied Piper of Hamelin has a mechanical puppet show that retells the famous story many times a day.

The medieval institution is home to the precious treasure stolen in World War II in one of the greatest art thefts of the 20th century.

On the highest peak in the Harz Mountains, science and the occult faced off in a failed attempt to turn a goat into a boy.

This cheeky statue of a man defecating gold coins graces the facade of a medieval guildhall.

This strange sculpture is an enigmatic icon of this medieval German town.

A purr-fectly spirited bronze celebration of local street felines through history.

The celebrated eyesore created by starry-eyed sweethearts.

Montmartre's sole surviving windmill became an iconic landmark for 19th-century painters, artists, and bohemians.