Home to nearly a third of the world's mud volcanoes, Azerbaijan is home to a messy, bubbling, and sometimes explosive landscape.

A monument to the thousands of Canadian soldiers who died capturing the French ridge during World War I.

This 12th century, partially destroyed, abbey has had several owners and was seized during the French Revolution.

700 iron sculptures crammed into a Mediterranean park.

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

This bridge was constructed from the rubble of the infamous Bastille.

Historic medieval fortified city in southwest France.

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

Ancient paintings known as the "Sistine Chapel of Cave Art."

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

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

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

A favorite Paris bar for U.S. expats, including Gershwin, Hemingway, and James Bond.

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

A scandalous Art Nouveau collaboration that set Paris all atwitter at the turn of the century.

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

A museum of carnival attractions where you are invited to ride the rides.

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

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

Notorious artist squat renovated into legal studios.

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

The vast, legendary catacombs hold secrets much stranger than stacked bones.

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

This statue pays tribute to the iconic musician in the place where he recorded his final studio album.