A hot dog stand where the heads are just as hot as the dogs.

Chicago's Navy Pier on Lake Michigan was a training hub for aircraft carrier pilots during WWII.

Home to a protest movement, a bombing, and a dramatic change in labor history.

An echo chamber with a waterfall wrapped around its base at the Embassy of Canada in Washington, D.C.

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

A unique botanical garden housed in three giant geodesic domes.

Parking lot where a Chicago mayor was inaugurated under very sketchy circumstances.

Landmark Chicago building narrowly avoided destruction.

A 400-foot-tall tall map of Chicago makes this once-ignored building stand out.

To find the "unicorns of the deep" you've got to go downstairs.

The site of the first couple's first kiss is commemorated by the most adorable presidential monument ever.

What's left of the ruins of the 1893 Columbian Exhibition, or World's Fair, also known as the White City.

According to the legend, this strikingly beautiful hill has miraculous healing powers.

Giant six-pack could provide one person a six-pack a day for 3,351 years.

Home to the world's largest refracting telescope and the birthplace of modern astrophysics.

Nature and religion are reunited at this unconventional church in the forest.

America's oldest archaeological site or a muddled case of wishful thinking.

The land is home to swimming ponies and a legendary 18th-century treasure.

"If she'd leave us alone, we would have a happy home, sent from down below."

The last masonry skyscraper ever built reveals a transitional moment in architectural history.

This monolithic statue was erected in honor of Chief Black Hawk (even if it wasn't made to look like him).

Known as the "Cross At The Crossroads," this massive metal cross is just short enough to avoid the FAA.

This softly rounded mansion was built without corners not to avoid evil spirits, but to make them more comfortable.

Half-sized replica of the Leaning Tower of Pisa built to honor Galileo.