Elevated freight railway turned wildly successful urban park.

This demon atop the Notre-Dame de Paris looks utterly bored.

The celebrated eyesore created by starry-eyed sweethearts.

The site of Austria's biggest concentration camp now honors its victims.

The bridge that cost Germany a World Heritage Site.

This Dresden church was purposely rebuilt Protestant after being demolished in World War II.

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

Built to give thanks for the passing of a plague epidemic, this cathedral is a one-of-a-kind architectural hybrid.

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

The holes in this wall provide a glimpse into Jewish life in Budapest, both past and present.

A plaque bearing the names of those who dedicated themselves to protecting Budapest's Jewish population during World War II.

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

Throughout this shopping mall are medieval ruins that were discovered during the mall's construction.

A plaque marks the spot where the saint was shoved off the Charles Bridge and into the river.

This Czech church doubles as something of a permanent fashion exhibition for a statue of the Infant Jesus.

This spooky statue sits outside a famous Prague theater.

Monument to a suicide protesting the Soviet invasion.

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

Looming communist pillar with a Czech twist.

This walkway is so narrow it needs its own light to stop pedestrian traffic jams.

One man's personal collection of KGB memorabilia is presented along with his strange viewpoint.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

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

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