A well-worshipped shrine to the Virgin Mary nestled inside the last of Zagreb’s historic gates.

A fantastical display of Croatian folklore, mythology, and myths.

A World War II evacuation tunnel turned into a history display of Croatian state and people.

Where the lovelorn find a home for their sentimental keepsakes.

An abandoned NSA listening post on Berlin's "Devil's Mountain."

Pop culture has helped to keep this iconic British building from being destroyed.

An eerie, derelict amusement park in Berlin.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

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

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

As can be expected from a centuries-old church built in a canal city, the undercroft of this house of worship is beautifully flooded.

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

Berlin's old airport.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

A fascinating insight into daily life in the Eastern Bloc.

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

A museum dedicated to the history of a terrifying secret police is now held in their former headquarters.

Near Belgrade, an ancient-looking sarcophagus serves as a World War I monument.

These abundant, over-the-top monuments are so widely scattered that they define the entire compact capital cityscape, often leading to jokes about whether there are more statues than residents.

A solar-powered primary school inspires hope and experimentation in a country ripe for energy innovation.

Museum about life, death, and cannibalism in the Stone Age.

Rare collection of medieval books under lock and key.

One of Serbia's oldest luxury hotels and a nostalgic echo to Yugoslavia in the state's former capital.

A retro Yugoslav congress, cultural, and business hall built in the 1970s, with an iconic world clock.