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

A comprehensive archive of Hallmark Holiday ornaments.

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

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

It's been called “Detroit’s largest art object.”

The collection of ceremonial and cultural objects spans many countries and hundreds of years.

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

The pieces in this sculpture garden are made from demolished buildings that were once landmarks of Motor City.

Standing guard on top of an old, vacant ice cream shop.

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

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

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

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

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

This sprawling bookstore spans four floors and has more than a million books in stock.

A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

The only Chicago bridgehouse open to the public contains a museum devoted to the Chicago River.

In 2004, a Dave Matthews Band tour bus dumped 800 pounds of waste off a bridge and onto an unsuspecting tour boat below.

Chicago’s last original drive-in restaurant is a family-run hot dog joint that started in 1948.

Tour the luxe "glass cage" that inspired and unnerved the architecture world upon its debut.

This sprawling mini-golf empire is an impressive testament to a disappearing attraction.

This museum celebrating the almighty dollar lets visitors literally stand in the shadow of a million bucks.

All of Chicago's wood-paved streets are long gone but two alleys remain.

Nonprofit art center that promotes outsider, intuitive, and self-taught art.