This historic-shipwreck-cum-diving-spot can still be seen poking its boiler out of the Lake Michigan waters that claimed it.

A plaque marks a former safe house on the secret route, now hidden next to a McDonald's.

Arguably the best example of an authentic Dutch windmill in the United States, rivaling its counterparts in the Netherlands.

This botanical garden outside Chicago boasts an array of more than 300 varieties of lilacs.

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

An outdoor urban gallery of large-scale artworks by the world's most influential street artists.

A strange and haunting monument of unknown origin in the historic Graceland Cemetery.

The iconic Chicago sculpture hides a beautiful and easily overlooked plaque on the backside.

The 606 is a decade in the making.

Fragments of architectural wonders from around the globe are embedded in the newspaper building's walls.

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

This overgrown Illinois water park offers a whole new type of adventure.

Built to house a chapter of the Knights Templar, this grandiose building is a relic of Freemasonry in Chicago a century ago.

Former meatpacking facility turned vertical farm and sustainable business complex.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

The world's only known button museum.

These abandoned grain silos and tunnels are an urban exploration dream.

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

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.

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

A hollow cement depiction of time's inexorable effect on the human body.

One of the first historical sites of an alternative universe was installed in the town of Paris, Illinois—which is now home to an annual spelling bee of Kcymaerxthaereal words.