This advertisement for talcum powder was painted on the rock face and has since defied removal.

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

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

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.

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

What was once the largest NFL stadium.

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

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

The steepest tramway in North America provides stunning views of the out-of-the-way Wallowa Mountains in northeastern Oregon.

This playground sculpture of an icon from the past is dedicated to the children of the future.

This metallic stampede sits frozen on a Washington ridge yet the artist's vision is still incomplete.

An exercise in patience and imagination, where Mother Earth turned common stuff into precious hidden treasures.

An outsider art duo's yard has been turned into a whimsical public gallery.

One small town in the Pacific Northwest transformed itself into a Bavarian-themed tourist destination.

This impressively large collection includes crackers shaped like Jimmy Carter, Mickey Mouse, and more.

The four tall pillars once marked the entrance of the historic Seattle church that fought for women's suffrage and civil rights.

This sculpture forces visitors to confront their relationship with space.

A rotting tree in the middle of Seattle doubles as an elaborately-controlled art piece.

A museum dedicated to the history and exploration of both popular music and science fiction.

This former coal gasification plant found a curious second life as a popular public park.

This remarkable collection devoted to the study of fish includes 1 million preserved specimens from all around the world.

Where else would a linchpin of post-colonial Native American cuisine anchor the menu but a museum?

Kings Cross Station pays tribute to its role in Britain's best-selling book series.