Budapest's Communist-era statues, banished to the suburbs.

Op-art architecture designed for happiness.

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

This Polish cave has housed a dragon, a brothel, and an enduring legend.

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

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

The famous sculptor left his mark on this Italian wall in an internationally protected example of street art.

A mocking tribute to the past and modern leadership of Prague.

Looming communist pillar with a Czech twist.

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

This private skyway is filled with art and was expanded explicitly so that Hitler could appreciate a river.

This sprawling concrete suburb of Kraków was designed by the Soviet Union as the model proletarian city.

Sofia's legislative center is continuously reinventing itself.

A striking symbol of the Bulgarian capital.

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

"Unity, Creativity, Beauty."

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

A turn of the century building boasting some of the most beautiful art nouveau architecture in Prague.

Inat Kuća, or "House of Spite," is more than just an oddly named restaurant.

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

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

An eerie, existential museum dedicated to the author of "The Metamorphosis."

A whale rib was used to advertise the store by the arch that offered exotic goods from far away.

A surreal statue honoring Prague's favorite literary son.