Glass and concrete building designed by Albert Kahn.

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

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

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

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

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

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

Once called Winthrop Park in 1889, home to a decidedly sexy tribute to the Monitor vs. Merrimac battle.

Every equinox this Maya pyramid puts on a spooky ancient light show.

Tiny memorials honor individual victims of the Holocaust.

This colorful overpass is one of Bhutan's longest suspension bridges.

A plaque immortalizes the spot where the early American spy said his famous last words: "I only regret that I have but one life to lose for my country."

Curious crustaceans support an obelisk from ancient Egypt that now stands in modern-day Central Park.

Once thought to be the fabled Holy Grail, it is now known to be an oil lamp.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

Revolutionary War casualties fill the only 17th century structure remaining in Manhattan.

This humble historic facade hides a history of boozing and the gentlemanly sport of rat-fighting.

Relics given to a Manhattan church to avoid seizure by the Italian government.

This former crime corner has been turned into an eclectic community center.

A living archive of urban activism and space reclaimed.

A notorious punk house turned co-op.

A reminder to choose water over wine since 1888.

Monument to a forgotten NYC disaster that claimed the lives of 1,000.

Touching mementoes from those who didn't make it back from World War I still hang in one of New York's oldest bars.