100-year-old shipwreck you can walk up to at low tide.

You might recognize this historic Oregon mansion from its appearance in 'The Goonies.'

The world's last remaining store of its kind.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

At the base of the Golden Gate Bridge, a small sign basically begs for a high-five.

Beneath the southern end of the Golden Gate Bridge is the “Gibraltar of the West Coast,” a fort built to protect the San Francisco Bay from naval attack.

An artsy hidden staircase leads to breathtaking views of San Francisco.

A house built from trash known as the poor man's Hearst Castle.

Advice-columnist's bell tower, paid for with pennies.

The bones of an old zoo crumbling in the shadow of a new one.

The Beaux-Arts aquarium boasts a vast collection of saltwater and freshwater fish on an island in the Detroit River.

Enormous small-business mecca in the Midwest, serving dozens of artists.

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

An ever-evolving wall of graffiti art off East Liberty Street.

A notorious Route 66 eatery once frequented by Al Capone.

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

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

Concrete igloos standing across from what remains of the Michigan Central train depot.

A Beaux-Arts triumph rises from decades of decay to become the heart of a new innovation district.

This stunning gothic ruin was a casualty of the Indiana steel industry crash.

This alley in downtown Chicago held the bodies of over 600 people after the fateful Iroquois Theatre fire.

A piece of outsider public art accompanied by a strange urban legend.

The original location of Vollis Simpson’s Whirligigs.

This historic sunny-yellow building has an unfortunate connection to the sinking of the Titanic.