This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

One hundred years ago this small house in downtown Zürich became the birthplace of the Dada movement.

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

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

Hidden within a Netherlands crater is a stone bed that lets those who lie in it see the sky as a curved surface.

A statue of the second-tallest Dutchman in history.

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

Built by crowdsourcing, this wooden foot bridge saved a part of Rotterdam that was languishing in wait of city funding.

A grassy pyramid named after a French battle.

A preserved building where the dead were once watched for signs of life.

This large sand dune in the Netherlands is home to wind-whipped trees with "floating" roots.

The world's first interactive human body museum also serves as a chair for a giant orange man.

An ancient Egyptian temple sits within a modern European museum.

This public library and its impressive collection of academic books have not changed since the 17th century.

Science meets wall art to highlight the beauty of famous mathematical equations.

An ingenious Dutch land art project uses grass ridges to cut airport noise pollution in half.

Amsterdam's former hotspot for public executions and dissections.

A public urinal so pretty, it was declared a national monument.

In the days before house numbers, these colorful signs held clues about various buildings' purposes.

A beautifully eclectic mix of architectural styles.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

Looming communist pillar with a Czech twist.

Increasingly decayed figures stand as a powerful reminder of the human costs of Czech Communism.

What looks like a suicide in progress is actually a statue of Sigmund Freud.