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

What was once the largest NFL stadium.

Detroit’s Eastern Market has been transformed into an outdoor museum with colorful murals that address social issues and symbolize the city.

Glass and concrete building designed by Albert Kahn.

This railway-turned-greenway provides a pedestrian link in downtown Detroit and celebrates urban artwork.

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

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

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

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

The remains of an abandoned dinosaur theme park litter the woods just off the highway.

This Detroit ruin was once a gothic bastion of its community, but now it stands as a haunting ruin.

Where Cusack's record store from the film "High Fidelity" was located.

Hot Doug's "Hot Dog" Stand.

A European-style bath house in Chicago.

Huge abstract sculptures of the Puerto Rican Flag.

This titanic Catholic church in Chicago is also a refuge of the fictional cult-favorite wizard detective Harry Dresden.

Location of the Real World's disastrous, and protested, eleventh season.

Illegal drag racing two stories beneath Chicago’s streets.

Not to be confused with the iconic New York City skyscraper, this Chicago building is a vibrant hub for artists.

To find the "unicorns of the deep" you've got to go downstairs.

An eccentric park and pool.

Once called the "Polish Gold Coast" it is an icon of the neighborhood that bears its same name.

One of the last functioning antique elevators in Chicago.

A beloved Chicago music venue offering cold beer and lots of “Friendly."