The site of William McKinley's tragic assassination is only marked by an underwhelming boulder.

This unique crypt designed by Frank Lloyd Wright for his longtime friend was not completed in either man's lifetime.

An elaborate memorial to a man local legend says died of a broken heart.

Ruins of a once-prized railroad station in New York.

The only surviving prototype for Buckminster Fuller's house of the future.

The concrete shell of an industry giant remains as a playground for graffiti artists, auto scrappers, and paintball warriors.

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

Glass and concrete building designed by Albert Kahn.

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

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

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

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

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

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.

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

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

An alley way dedicated to graffiti and street art is a constantly changing street gallery.

A three-piece musical sculpture installed between the subway tracks at Kendall Station near MIT.

This monument on Breed's Hill proves that one of the most famous battles of the Revolutionary War is misnamed.

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

This nearly 200-year-old restaurant's history includes an exiled French prince, JFK, and a very hungry Daniel Webster.

Millions of numbers carved in glass represent the tattoos forced upon victims.