This French ghost town from World War II has been left as a memorial to German atrocities during World War II.

The doodles of a genius line the walls of a secret room under the Medici Chapel, where they were hidden for nearly 500 years.

Lady Liberty's original designer installed a little clone in this French fountain.

The world's largest reflecting pool is just two centimeters deep.

A former steam-powered mill from the 1800s is now an industrial park with a giant steel dragon slide.

Step inside the first house designed by Catalan architect Antoni Gaudí, considered to be one of the first Art Nouveau buildings.

An unusual stroll through gentlemen's erotica demonstrates that pornography is timeless.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

This semi-secret storybook hedge maze is also the oldest garden in the city.

Wonderland replication in progress by one persistent man.

This salt marsh in Southern France is as pink as the flamingos that inhabit it.

A 16th-century fountain marks the site of a lost medieval cemetery once filled with mass graves.

This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.

The first green space constructed on an elevated viaduct.

Down a cobblestone alleyway is a museum dedicated to Romanticism, with a secret garden.

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

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

The towering Pinocchio stands 63 feet tall in the Italian village his creator frequented as a child.

Walk through a fairytale in Tuscany.

A labyrinth of ancient tunnels hidden below the city holds the ruins of 2,500 years of history.

Gigantic mosaic sculptures of the figures on Tarot cards fill this colorful Tuscan garden.

What looks like a link in Gondor's early warning system is actually a centuries-old Italian fortress.

Medieval town turned hippie commune, once home to the secret foreskin of Jesus Christ.