A surreal statue honoring Prague's favorite literary son.

The palace window through which Protestant nobles flung two Catholic regents, thus sparking the Thirty Years' War.

Increasingly decayed figures stand as a powerful reminder of the human costs of Czech Communism.

Europe's second largest ossuary wasn't discovered until 2001.

Macabre astrological automaton clock dating to the late 1400s.

The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

Ancient serpentine sacrifice holder that has stood the test of time.

A vast Communist-era exhibition space in the Bulgarian capital.

"Holy Wisdom" overlooks the city that became its namesake.

A striking symbol of the Bulgarian capital.

This former KGB building is now a museum memorializing the people who suffered during the Soviet regime.

The haunting complex honors the millions of Ukrainians who died in the forced famine under Soviet rule.

340-foot statue built to honour the Heroes of the Soviet Union.

Stockholm's narrowest alley is barely over two feet wide.

This chimerical bridge/tunnel appears to dead end right into the sea.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

An ancient knight and a symbol of the city's freedom.

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

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

This giant middle finger statue sends an unambiguous message to Italy's bankers.

Erotic art covers the walls of the largest ancient pleasure palace.

The walls and streets of the ancient city are peppered with penises.

Ancient snack bar of the Roman Empire re-opened.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.