100 year tradition of fist fights, marked by marble footsteps.

This palatial spiral staircase was so unusual the name "snail" was given to the noble family who built it.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

This abandoned Slovenian military barracks has become a punky-political art squat.

This one-time health resort was used by aristocrats around the world.

Strange rumors surround the artist who created these solemn metal guard dogs.

A trough of 700 strange bronze faces runs through a narrow alley in Ljubljana's old town.

Martin Bricelj Baraga's monolithic sculpture measures the blueness of the sky, and changes color to match it.

A whimsical bridge adorned with decorative dragons.

Europe's first floating restaurant is home to a hilarious legend.

A statue in Budapest's Liberty Square honors the former U.S. president's efforts to end the Cold War.

A random tree outside a Budapest hotel has become a DIY shrine to the late singer.

A Trabant car, a kangaroo statue, and a plethora of plants take over this abandoned-factory-turned-bar.

This off-beat, quirky communism-themed bar isn't afraid to poke fun at its history.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

This statue of a falling man commemorates a teenage martyr of the Hungarian Revolution.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

Go inside to really appreciate this 500-year-old technological masterpiece.

This equestrian statue of Constantine the Great has been the subject of criticism for centuries.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

This 1920s Dutch barge is now a floating bookstore.