A little-known subterranean street runs under some of the best-known buildings in Chicago's River North.

The iconic Chicago sculpture hides a beautiful and easily overlooked plaque on the backside.

This memorial plaque remembers a strangely shallow maritime disaster known as "Chicago's Titanic."

Once a bastion of its community, this gothic cathedral now stands as a haunting ruin.

An ornate Detroit church, left empty and ravaged by time.

Detroit housing collective working to create an "environment for revolutionary change."

Collective made up of artists, musicians, and activists.

It's gunky, it's gross, and it's been freed from the sewer and put on display.

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

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

38-story baroque tower reflecting Detroit's rise, fall, and possible rise again.

Opulent downtown movie theater now houses cars as an indoor parking garage.

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

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

Home of the Daffodil Festival, Castle Craig, and a ghostly hound.

One of the few working locomotive roundhouses in the United States.

Little did a museum know, they possessed the last-known lunch wagon in existence.

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

The remains of a failed canal can be found in several towns near Lake St. Clair and is known historically as "Mason's Folly."

A historic cider mill still using time-tested techniques.

This mechanical wonder towers above a river in Michigan's capital city.

Perched atop a brick smokestack, this enormous lug nut symbolizes the local minor league baseball team.

The unusual medical inventions of the man who gave the world Corn Flakes.

Dating back to the 1800s, two imposing buildings in Michigan have had countless transformations over the years.