Inside this McDonald's you can dine on your Big Mac and fries next to a 2,500-year-old Roman wall.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

The former home of France's controversial pop maestro is almost completely covered in ever-changing tributes and graffiti.

Hidden away in a modern library are the remains of one of the 18th century's most celebrated wunderkammers.

This museum houses an imposing skeleton army comprised of creatures great and small.

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

This basement museum explores the art and artistry of fascism.

A line number in Amsterdam that will likely never be used again due to its tragic history.

This pirate-broadcasting-tower-turned-restaurant played a rebellious role in the history of Dutch television.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

A floating cat sanctuary on an Amsterdam canal.

The world's only museum devoted to the wonders of fluorescence.

Eight naturally mummified bodies in glass coffins are housed in an underground crypt.

A charming and enigmatic sculpture of a lynx haunts the park of Kellinghusen.

Hamburg's first legal sex work is relegated to a gated street that still does not allow pedestrian women.

This ancient Roman prison is decorated with an upside-down cross not as blasphemy but as saintly tribute.

A Nesting Doll of Churches.

Architectural monsters are devouring this palace's every door and window.

The skull of the patron saint of lovers lies in the Basilica di Santa Maria in Cosmedin—maybe.

The yawning maw of this pagan visage is said to bite off the hands of liars.