A monument to the art of slicing people open.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

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

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

Largest tulip festival in America, includes fireworks, a parade, and a carnival.

World's largest Christmas store.

An ever-evolving wall of graffiti art off East Liberty Street.

A sealed test tube said to hold Thomas Edison's dying breath was given to the inventor's friend and mentee, Henry Ford.

Trade in that pesky human soul for cold-hard circuits.

This national park on the shore of Lake Michigan features remarkable dunes that lie at the heart of a Chippewa legend.

Berry Gordy Jr.'s old home was the original headquarters of Motown Record Corporation.

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

The mansion home of author Edith Wharton.

Inspiring Herman Melville and Henry David Thoreau, Mount Greylock in western Massachusetts is the highest point in the state at 3,491 feet above sea level.

More than 200 unconventional musical instruments that anyone can play.

Naturally formed white marble arch housed in an abandoned marble quarry from the 1800s.

Resonating tubes make music from highway overpass.

The final resting place of a suffragist author.

The museum moved on, but the diorama remain.

Where most of the world's flypaper was made.

The origin of the Nixon tapes is rooted in technological incompetence as much as secrecy.

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

One lonely, modern pyramid has gone from corporate think tank to deserted boondoggle.

This cavernous abandoned marble mine is popular with ice skaters in the winter.