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

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

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

A haunting collection of the vanished and disappearing natural world.

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

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

Abandoned railway line circling the city of Paris.

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

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

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

A massive stone fox oversees a Rotterdam elementary school crosswalk.

Portraits of musicians line Oude Binnenweg, the jazziest street in the city.

An early 19th-century English style garden hidden in the Rotterdam cityscape.

This colorfully-painted tunnel links two distinct parts of a historic neighborhood.

A dramatic art installation features a BMW flying out of a building in Rotterdam.

A statue of the second-tallest Dutchman in history.

The world's first floating farm is staffed by one human, three robots, and 35 cows.

A true Valhalla for cactus and succulent lovers.

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

The legendary giant's severed hand sits on Antwerp's popular shopping street.

A man throwing a giant severed hand towers over Antwerp’s main square.

This statue dedicated to the story of a Flemish boy and his dog was relatively obscure in Belgium, but a cult sensation in Japan.

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

Christ's blood preserved in a Belgian town.