This grand manse has been transformed into a museum devoted to one of the founders of Fantastic Realism.

This series of Baroque passageways in Vienna's cultural center mix old architecture with modern art.

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

A non-stop elevator ride in Vienna's city hall.

A set of outdoor stairs named in honor of a famous Austrian artist.

Journey through a mesmerizing array of board games inside this museum.

A gift from Emperor Franz Joseph I to his wife.

Along the edge of this fountain are 365 smaller fountains that represent the days of the year.

An ornate private entrance to the Vienna subway built specifically for the emperor.

Vienna's diversity-themed traffic lights were inspired by the Eurovision Song Contest.

A rooftop restaurant hides in plain sight atop Vienna's Palace of Justice.

Vienna's underworld of tunnels and subterranean rivers made an iconic appearance in a 1949 Orson Welles film.

The resting place for anonymous victims of the Danube's dark waters.

The topiary maze at the Habsburg hunting lodge.

At nearly four meters tall, this giant potato looms over a small Polish town.

A Bauhaus co-founder designed this quirky, abandoned granary.

A Soviet era flat that refused to conform to the dull gray standards.

This wooden mosque is one of the few remnants of medieval Poland's Muslim Tatar community in this deeply Catholic country.

The center of this Polish border town was so thoroughly wiped out in World War II that only the foundations remain.

This formerly-prosperous Silesian mining town was completely demolished in the late 1960s and early 1970s as an attempt to cover up a secret Soviet uranium mine.

Catch a scenic view of Warsaw's Old Town from the top of a centuries-old dumping ground.

This unique railroad museum secretly contains the history of Poland rebuilding itself from the inside-out.

Atop this library is one of the most beautiful green spaces in Warsaw.

On this Polish road, an optical illusion makes cars seem to roll uphill.