Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

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

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

The former private quarters and office of Dr. Sigmund Freud now hosts a museum housing the works of the founding father of psychoanalysis.

The topiary maze at the Habsburg hunting lodge.

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

A little sculpture with a large wardrobe.

Cozy basement bar sports an inventory of over 2,000 beers.

Climb inside an iron crystal magnified 165 billion times its normal size.

The home made famous by the 1983 holiday classic is now a perfectly preserved shrine to the movie.

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.

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

The world’s largest Masonic temple was saved by the White Stripes.

A painted-over wall in Detroit originally built to segregate a black community from an adjacent white development.

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

Berry Gordy Jr.'s old home was the original headquarters of Motown Record Corporation.

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

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

The abandoned remains of this once-thriving hotel looms over the city, awaiting an uncertain future.

These red and black houses were awarded to the firefighters who saved their city from an enormous blaze.