The mental institution where Van Gogh created some of his most famous work now allows guests to walk in the artist's footsteps.

Historic medieval fortified city in southwest France.

Exquisite wall sculptures carved in secret by an early quarryman in an obscure corner of the Paris Catacombs.

The famous winding walk at Chartres is surrounded in mystery and myth.

A 14th century bridge built as a fortress, where the devil lurks on one of its towers.

Hundreds of hidden passageways weave through the old quarters of Lyon.

In the best of all possible worlds, everyone will get a chance to see this statue in which Voltaire's heart is interred.

An overlooked marble is the only surviving in-place 18th century example of the measurement that changed how we define distance.

Science fiction's grandfather has a fittingly marvelous tomb.

Sacked by Vikings, blessed by William the Conqueror, dealt a fatal blow during the French Revolution—these ruins have seen it all.

A majestic lion statue guards this Parisian botanical garden, and feeds on an unsettling item.

19th century pendulum and a clock restored by a rogue group of guerilla artists.

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.

"In the Dark" Restaurant in Paris offers dinner in complete darkness.

A surrealist timepiece by the artist of melting clocks.

The very center of Paris is surrounded by a bevy of strange good luck rituals.

Paris' linguistic guide to the international language of, yes, love.

Abandoned railway line circling the city of Paris.

This one-room museum is dedicated to Norwegian history and jokes.

At the very tippity-top of Europe is a cliff from which you can view the midnight sun.

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

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

"The most colorful grottoes of the world.

Soaring over 6,000 feet in the Bavarian Alps, this beer garden was once Hitler's 50th birthday present.