The "Prussian Versailles" that is as glorious today as when it was built.

Where once there was a train station bathroom, there is now this German burger joint.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

The most visited, and possibly most controversial, museum in Germany.

A "sinister, whimsical, tacky, and really orange" public art installation hidden under a Seattle bridge.

The tech giant built three enormous glass orbs in Seattle so employees could work inside a rainforest greenhouse.

An alley covered with 20 years of bubble gum.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

The site of a concentration camp where inmates were made to take part in one of the largest counterfeiting operations in history is now hauntingly empty.

Explore the complex ecology of this multifaceted nature preserve by riverboat.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

One hundred years ago this small house in downtown Zürich became the birthplace of the Dada movement.

Scattered throughout London are ancient remnants of the city's former bounding wall.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

Metro station with a claim to rock n' roll fame.

A traditional U-Bahn station in Berlin gets a string of rather untraditional benches.

This Berlin island is home to a flock of free-roaming peacocks, as well as a historic ivory folly.

This micro-nation may be some sort of prank, but its constitution sure seems official.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

The largest permanent Monopoly board makes one of the longest games even bigger.