Baroque celebration of the end of the Great Plague of Vienna.

A spherical "micro-nation" in the heart of Vienna.

The house that took a plunge into the facade of a museum.

A silly medieval mural preserved on the side of a Viennese house.

Skulls from the plague of 1656 and World War II bombings are united by a cult dedicated to caring for the ancient dead.

San Gennaro, the patron saint of Naples, greets pedestrians between these narrow city streets.

This shining multicolored metro station deep under Naples is said to be the most beautiful in Europe.

A miraculous three-handed portrait of a saint can be found inside this church.

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

A flamboyant five-story building in Bulgaria resembles a crawling snail.

A 16th-century fountain marks the site of a lost medieval cemetery once filled with mass graves.

This structure atop a craggy cliff in one of the most beautiful parks in Paris boasts an unbeatable view.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

A surrealist timepiece by the artist of melting clocks.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

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

Spitalfields' regal market goat is said to be a monument to the area's migrant population but most are pretty sure it's just a goat.

The fierce beast perches atop a pedestal marking where the historic City of London gates once stood.

The Metropolitan Police refurbished the blue box (perhaps not coincidentally) the same year "Doctor Who" returned to TV screens.

London's smallest police station is barely the size of a phone booth.

Several plaster noses are hidden in plain sight around London's Soho neighborhood.