Twelve grave-faced marble angels guard the emperor's tomb at Les Invalides.

The Sun King's military models, saved from the Louvre.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

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

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

Site of a classic 19th-century physics experiment to prove the earth is rotating.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

A series of abstract, silly sculptures represent the works of a great modern classical composer.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

A museum on the history of Paris, including a set of Napoleon's toiletries, Proust's room, and relics of the Revolution.

Pitié-Salpêtrière was the dumping grounds for women who received the dreaded diagnosis of "hysterical."

France's most famous cemetery, with some of its most curious tombs.

Ordinary art transforms to extraordinary thanks to locals' quirky sense of humor.

A striking 12th-century-style castle built on the edge of a cliff.

The Swiss artist's bulbous and overgrown shape-shifting sculpture controversially graces the center of Bern.

The bears of Bern have been a city highlight for over 500 years.

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.

Eco-village hidden in the foothills of the Alps that created a massive system of psychedelic underground temples.

A whimsical bridge adorned with decorative dragons.

Geothermal waterfalls in Tuscany.

Water and windows define this defensive Italian well.

Massive galleon from a box-office bomb docked in Genoa.

This cathedral hides a sculpted dog that determines your fate and an unexploded shell from World War II.