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

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.

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

This sprawling bookstore spans four floors and has more than a million books in stock.

The mortal remains of an estimated 70,000 people lie in the basement of a monastery in Lima, Peru.

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

A historic estate packed with George Washington's heirlooms, and its own nuclear bunker.

Fittingly, America's museum of architecture is itself a magnificently designed old building.

A cavernous three-story, 43,800-square-foot basement that was forgotten about for 60 years.

There's a 12-foot-tall replica of the Washington Monument hidden under a manhole nearby.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

Home to items never before seen by the public.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

The spot where the fascist dictator made some of his most famous speeches including declaring war on Britain and France.

Built on the remains of one the Incas’ most important gathering spots, this square keeps the spirit of a fallen empire alive.

Situated on a sacred Inca site, this 16th-century cathedral took nearly 100 years to build.

It took 82 years and four different plaques to finally get the story right.

This geometric feat is a testament to the Incas' mesmerizing architectural abilities.

On this tiny spot of land in the middle of Lake Titicaca the only ones who do the knitting are the men.

A painting in the historic Cathedral Basilica depicts Jesus and his disciples dining on a traditional Peruvian menu.

Did Inca children also slide down these smooth rocky slopes above Cusco?

The Uros people live on floating reed islands in lake Titicaca.