Not to be confused with the iconic New York City skyscraper, this Chicago building is a vibrant hub for artists.

Assemble a masterpiece at the first and only North American school exclusively dedicated to mosaic art.

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

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

Former bath house turns gastropub.

Quirky water tower advertises the long-gone Brooks Tomato Products Co.

Even with only two residents and one building, this tiny Illinois town is famous for its burgers.

One of the largest pieces of scientific equipment ever carried on a NASA space shuttle sits in a Chicago alley.

The legacy of an unsolved, gruesome murder rests beneath the spans of this historic bridge.

World's second largest particle accelerator, where nature reveals its secrets.

A notorious Route 66 eatery once frequented by Al Capone.

The final resting place of the world's first nuclear reactor.

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.

The city of Rockford, Illinois is symbolically protected by a quartet of fittingly stony sentinels.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

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

River pirates, murderous bandits, and serial killers used this Illinois cave as their debauched hideout.

A display of magnificent stained glass windows is the first exhibit of its kind.

All of Chicago's wood-paved streets are long gone but two alleys remain.

A once-booming Mississippi River town with a history of racial violence is now eerie and mostly abandoned.

While he no longer has an eatery to give him context, this off-brand Paul Bunyan still holds his giant hot dog with pride.

Cemetery featuring rare glass-fronted columbarium.

What was once the second largest steel mill in the US is now a sprawling complex of modern ruins.