Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

A historic casino where Dostoyevsky is said to have lost it all on a single spin of the roulette wheel.

A rare water-powered funicular, it uses a huge tank of water and gravity to do its work.

Along the banks of the River Rhine lies a park that seems unassuming, but beneath the surface lies a long and fascinating history.

A nude beach alongside a washed-out road.

Island ghost town detailing Flagler's folly in building the Overseas Railroad.

An exotic wildlife habitat right off The Strip.

One of the world's tallest Ferris wheels takes visitors high above Las Vegas in a spinning party room.

A series of playful yellow penguins share a serious message about the environment.

The slender brass strip in Prague's Old Town Square was used to tell time from 1652 to 1918.

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

The risqué mixed-media sculptures are supposedly a metaphor for Czech politics.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

Dedicated to the European Sinti and Roma peoples murdered during the Holocaust.

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

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

The most visited, and possibly most controversial, museum in Germany.

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

Personal garden filled with mosaics made of recycled garbage.

Near the ruins of a Civil War coastal fortress lies the only known African refugee cemetery in the United States.

The highway's southernmost spot is a beloved local attraction.

An idyllic swimming pool tells the tale of Hemingway's trouble with women.

"We Seceded Where Others Failed."

The birthplace of American international flight service has been turned into a celebrity's microbrewery.