This 1960s kinetic artwork has been restored and is once again whirling away in downtown Minneapolis.

No one's quite sure where this quirky university tradition originated.

Downtown Minneapolis mixed art and function by turning some of their sewer covers into works of art.

A bronze statue on a downtown corner honors Minneapolis's favorite career gal.

The only arched bridge made of stone on the entire Mississippi River.

A toweringly silly piece of modern art has been delighting locals since the 1980s.

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...

20,000 pieces in a Frank Gehry-designed building.

On the right bank of the Grand River a plaque remembers an imaginary painter who once awaited his youth.

Where most of the world's flypaper was made.

Where the Model T was made and the assembly line was invented.

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

An angular maze of concrete in Grand Rapids acts both as public art and as a staircase for fish traveling upstream.

A painted-over wall in Detroit originally built to segregate a black community from an adjacent white development.

A park and memorial dedicated to the victims of the deadliest school massacre in American history.

The remains of a religious colony, its amusement park, zoo, and baseball empire.

More than 200 unconventional musical instruments that anyone can play.

What was once a true peninsula has now been filled in, causing the water to recede and leaving many streetside "waterfronts" and landlocked "islands."

This bridge was the birthplace of a unit of measurement based on a fraternity joke.

The largest body of water in Massachusetts annihilated four small towns just to slake Boston's thirst.

American revolutionaries and British soldiers alike are buried here in the fourth-ever cemetery in Boston.

Historic Hull Street was actually the first street with a proper name in the Boston area.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

An easy-to-miss garden in Boston's North End honors the mother of JFK and others who lost children in WWII.