The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

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

Advice-columnist's bell tower, paid for with pennies.

The birthplace of the Ford Model T is now a museum full of antique cars.

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

38-story baroque tower reflecting Detroit's rise, fall, and possible rise again.

Detroit’s downtown castle is one of the oldest structures in the city.

To truly appreciate Detroit's landmark skyscraper, you have to step inside.

These enduring murals depicting a distinctly Marxist tribute to capitalism could not even be defeated by McCarthyism.

Opulent downtown movie theater now houses cars as an indoor parking garage.

One man's attempt to create an artistic wonder on a run-down block in Detroit.

A Beaux-Arts triumph set to become Ford's innovation campus

A section of the long chain that blocked enemy ships from entering Constantinople.

Balanced on four stone pillars, this historic tower was the site of a tragic political assassination.

This historic hotel preserves many treasures from its heyday hosting passengers on the Orient Express.

Climb a set of vertiginous stone steps to the top of this impressive ancient edifice.

Brawny guys rolling around in oil is the oldest regular sporting event besides the Olympics.

Climb a steep hill in 90 seconds on the second-oldest urban subway in the world.

Carvings in Turkey's Marble Road may have directed ancient Romans to a hidden brothel.

The ancient latrines of the Greeks, in all their public glory.

The best-preserved ancient theater in the world.

A mysterious ancient cemetery with Roman sarcophagi and Lycian inscriptions.

Ancient serpentine sacrifice holder that has stood the test of time.

A charming beach town in Turkey captures all the colors of the rainbow.