This subterranean studio is filled with fascinating kinetic art.

Cat art as far as the eye can see.

Amsterdam's narrowest house facade is a monument to 17th-century tax evasion.

A Dutch passageway's artistic, aquatic-themed makeover pays tribute to the capital city's famed waterways.

A floating cat sanctuary on an Amsterdam canal.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

The patron of this extravagant Art Nouveau confection insisted that nothing less than a boat should project from its facade.

This small corner bar is home to a rare 1930s dance organ that still plays tunes for one Euro.

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

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

To enter this cluttered-yet-cozy sanctum of Belgian brews, ring the bell and tell the gatekeepers you've come “to taste beer.”

After a nearly successful attempt on Hitler's life, the conspirators met their fate in the courtyard of this Berlin building.

This lower Manhattan bar is set up in an old bank vault that rests beneath a skyscraper that hides even more historic splendor.

Once the tallest building in the world and the site of "the highest dinner ever held in New York" this building now holds the most expensive penthouse in the city.

Elevated freight railway turned wildly successful urban park.

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

Dodge prohibitionists and slide through the telephone booth in Crif Dogs.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

Two nearly identical Chinese pagodas stand side by side, along with ancient stone relics.

This bridge dates back to the 9th century and allows visitors to walk an ancient path amid modern industrial trappings.

The Chinese have long been excellent at the art of copying, but this epic replica takes the biscuit.

An collection of Chinese propaganda posters from 1949 to 1979.

The world's first hotel built in an abandoned water-filled quarry.