This automated sculpture of two men peeing will spell out text messages with their micturition.

This walkway is so narrow it needs its own light to stop pedestrian traffic jams.

The largest and best-preserved rotunda in Prague.

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

Eight naturally mummified bodies in glass coffins are housed in an underground crypt.

A spitting ode to a German serial killer.

Giant wind turbine with observation deck at the very top.

The Suurhusen church tower in Germany leans over farther than the famous Leaning Tower of Pisa.

A decomissioned facility where the German "Transrapid" maglev trains were once tested.

This cemetery features modernist statues as strange as its name.

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

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

This house's itty bitty size means no humans allowed.

Vibrant street art created with mixed media.

This architectural oddity is an oasis of green on the outskirts of Valencia.

This abandoned viewing platform has become a monument to unnecessary government spending.

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

A curious fountain that resembles a beloved character from the 1960s.

Touching this little fossil embedded in the wall of a grand mosque-cathedral may make your wishes come true.

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.

This former charity hospital for elderly clergy houses some of Seville’s most treasured paintings.

The world's largest wooden structure.