This bronze statue of Martin Luther King was placed in the park without permission.

This 22-floor tower's Skydeck offers panoramic views of Amsterdam.

Seven mini rowhouses fill the gap between 54 and 70 Westerstraat.

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

Cat art as far as the eye can see.

Amsterdam's Red Light District leaves little to the imagination.

A larger-than-life house of cards stands outside the house of a former fashion designer.

Two very green residential towers cleaning the air in one of Europe's most polluted cities.

The secret medieval communication system will whisk your words above the noise of the crowd.

Cold war icon and onetime "hole" in the iron curtain.

What started as a tongue-in-cheek shrine is now a full-blown museum celebrating "The Hoff" and his longtime love affair with Berlin.

The last remnants of a massive medieval wall that once encompassed the city of Berlin.

A slice of central Asia in the middle of Berlin.

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

An artist's mausoleum with a haunting echo.

Housing the famous Norwegian ice-defying 19th century polar exploration ship.

The painter of "The Scream" is laid to rest under a stoic bust of himself in the humble corner of an Oslo cemetery.

Thousands of miniature bronze sculptures have taken over this city square creating a unique art installation.

Tens of thousands of tiny bottles stuffed with various items.

This floating sculpture of ice is a poignant reminder of nature's power.

In the world's oldest university is a stunning 17th century anatomical theater carved from spruce.

In this small strip mall resides the largest collection of original art from the famed TV artist.

Inside a former cabaret, seven floors of erotic art.