Anonymously sculpted and donated, these sculptures made from poetry books and pages are sprinkled around the city.

This hidden Art Nouveau courtyard is an opulent feast for the eyes.

East London art gallery showcasing contemporary art from Europe's Eastern Bloc.

Three small rooms at the back of the “official” church of London's clowns.

These marks in Myddelton Passage aren't your run-of-the-mill vandalism, and they weren't made by your typical vandal.

The beloved beast's taxidermy remains sit in the Natural History Museum's cafe.

These mysterious Viking chess pieces spent centuries hidden on a remote Scottish island.

Traveling collection of amazing automata.

A historic London pub with prison cells in the cellar and a "spy room" on the second floor.

A gigantic statue of a Russian soldier watches over the ancient city of Plovdiv, a prominent reminder of the Soviet period in Bulgaria.

Two stunning 17th-century libraries and a cabinet of curiosities.

The geographical center of Budapest is marked with a 10-foot-tall stylized zero.

A Hungarian optometrist's charming collection of Asian art and curiosities.

Central Europe's largest collection of mini-bottles is on display at this museum devoted to a bitter Hungarian liquor.

A new sculpture calls attention to climate change in the centuries-old city it threatens.

In the past, Renaissance sex workers were encouraged to entice customers on this bridge.

The 2,000-year-old Roman columns are hidden within Barcelona's Gothic Quarter.

A fascinating insight into daily life in the Eastern Bloc.

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

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

The eclectic seaside sanctuary caters to a rather fowl crowd.

The floor of this spectacular Baroque sanctuary is covered in memento mori.

Destroyed Serbian army headquarters sits half crumbled in a largely revitalized Belgrade.

Nikola Tesla's ashes are held in a golden sphere, surrounded by his works.