The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

This monumental work of art symbolizes the coming together of a previously divided city.

Metro station with a claim to rock n' roll fame.

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

Tiny memorials honor individual victims of the Holocaust.

The skeletal frame of a decommissioned gas-pumping station offers breathtaking views of greater Berlin.

Cold war icon and onetime "hole" in the iron curtain.

The walls of Germany's Parliament still show the scars of the Red Army takeover in World War II.

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.

The celebrated eyesore created by starry-eyed sweethearts.

Montmartre's sole surviving windmill became an iconic landmark for 19th-century painters, artists, and bohemians.

This facility has manufactured stunning tapestries for France's royalty ever since the 17th century.

If you look closely at the oldest bridge in Paris, you might notice hundreds of ugly faces leering from its sides.

A French artist's vague warning hangs over Belleville.

This bridge was constructed from the rubble of the infamous Bastille.

This structure atop a craggy cliff in one of the most beautiful parks in Paris boasts an unbeatable view.

The first green space constructed on an elevated viaduct.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

Detroit’s Eastern Market has been transformed into an outdoor museum with colorful murals that address social issues and symbolize the city.

Controversial tribute to the heavyweight champion boxer who grew up in Detroit.