If you look closely at the oldest bridge in Paris, you might notice hundreds of ugly faces leering from its sides.

The tombstone of an unfortunate explorer who disappeared in the Paris Catacombs.

A gruesome combat between a hunter and a furious momma bear.

The site of slaughterhouses that once satisfied Parisians' taste for horse meat is now home to a park and book market.

For more than a century, revolutionary graffiti has marked the wall of a Parisian church.

A melancholy jester sits on the grave of a famous 20th-century ballet dancer and choreographer.

Executions were once held near this beautiful 18th-century fountain.

A giant silver apple a day keeps the perils of capitalism away.

A tribute shrine where the Space Invasion street art movement started.

The remains of the medieval wall that once surrounded Paris with ties to the construction of the Louvre.

A subterranean shelter remains intact under a busy Paris railway station.

After a profound show of devotion for his master, a dog becomes the symbol of loyalty for an entire nation.

Go through the looking glass in Tokyo's Wonderland-themed shop.

Once a black market electronics marketplace, now an otaku shopper's paradise.

Colloquially known as “piss alley,” this narrow street filled with tiny bars and barbecue stands looks like it was pulled straight out of “Blade Runner.”

The legendary birthplace of the Japanese maneki-neko is dotted with hundreds of lucky beckoning cats.

A 20-meter (65-foot) robot towers over Tokyo Bay.

Tokyo’s only Vaudeville-cuckoo clock–steampunk-Victorian curio cabinet time piece.

A magical place that lets you play in and explore the world of Studio Ghibli.

A water reservoir disguised as a castle stands atop a hill in a park in Stockholm city.

Frequent fliers welcome in this airplane hotel.

Now a hotel, this former bank was the site of a robbery that spawned a psychological phenomenon.

Sweden's "good old days" painstakingly re-created in a model village.

Dine on food tied to Viking history and legend at this subterranean Stockholm spot.