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

Where the Model T was made and the assembly line was invented.

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

Glass and concrete building designed by Albert Kahn.

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

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

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

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

A bronze of the man in all his sinewy glory celebrates his longtime connection to the Ohio city.

This kitschy tavern is also home to rare early editions of "Treasure Island."

Once the most flame resistant building in the country, the South Carolina Historical Society building was almost burnt down in a fire.

A stack of stones steeped in Irish folklore, much like the hero they're connected to, hide in plain sight.

This small memorial is almost as well concealed as Smalls himself was on the night he sailed to freedom.

Most historians agree that the so-called "Gentleman Pirate" wasn't much of either of those things.

Twenty-eight years after this local landmark was washed ashore by hurricane Hugo, it was washed away by hurricane Irma.

One of the oldest living oak trees in the Southeast.

Paths are maintained, but trees have taken over plots.

South Carolina's last remaining slavery auction house is now a museum devoted to its own tragic history.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

More than a century after her death, Little Gracie Watson remains one of Savannah's most often-visited residents.

Formerly Fire Station No. 27, the museum is a hidden gem in the heart of Hollywood.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

A sign at the end of the Santa Monica Pier marks the traditional end of the legendary American highway.

A dazzling display of lights and crystals.