A popular place to pick up prehistoric coral fossils from the time when Michigan was an ocean.

World's largest Christmas store.

This national park on the shore of Lake Michigan features remarkable dunes that lie at the heart of a Chippewa legend.

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.

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

Strange physical sensations and optical contradictions keep visitors coming back for more.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

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

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

Hell on Earth is actually a small town in Michigan where anyone can be mayor for a day.

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

The 80-foot tire that looms over Michigan's I-94 was once a Ferris wheel in the New York World Fair.

The world's largest man-made underground caverns offer unparalleled underwater wonders.

Quirky water tower advertises the long-gone Brooks Tomato Products Co.

Fresh wooden posts have been added to ancient holes to recreate a primitive henge clock.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

This titanic oil company sign is a reminder of the Americana boom of the 1970s and also its commoditization.

An abandoned factory along the Mississippi coated by a giant mural.

Man-made geyser that rises to the exact height of the Gateway Arch.

Less a museum than a bizarre fantasy world created by artists and engineers.