Large Hadron Collider and the Birthplace of World Wide Web.

The fairy tale castle of the "fairy-tale king."

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

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

This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

A constellation of golden cobblestones shows the names of local children born under a full moon.

A fantastical 13th-century fortification sandwiched by a modern hotel in central Brussels.

Meet the bronze beloved pet to a family of famous peeing statues.

This collection of over 50 murals celebrates Brussels' rich history as the self-proclaimed home of the "comic strip."

This former Masonic lodge has been transformed into part museum, part bar, all awesome.

A set of seven houses, each built in a style that represents a European country.

The video game-themed street art first popped up in the French city.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

This massive library holds what was once the largest book collection in the world.

Enter the cabin of a life-sized Hindenburg replica.

A lakeside footbridge that records Nobel Prize laureates' names in metal silhouette.

This museum tells the story of lake dwellers from 4000 BC to 850 BC, replete with stilt houses and goats.

One of the longest wooden benches in the world snakes around Geneva's Treille Promenade.

A rare, flower-shaped example of Brutalist architecture in Switzerland.

One of the most historical literary characters continues to stroll his hometown.

Some 80,000 Delft Blue tiles line the inside of this Amsterdam walkway.

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

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

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