How did a 2,000-year-old Roman column find its way to a Chicago park?

The last remnants of a lakeside airport that was bulldozed overnight by the mayor of Chicago.

Honoring the star of the “The Bob Newhart Show” which took place in the city of Chicago in the 1970s.

These murals have been brightening a Chicago beach for more than 30 years.

The rodent-shaped sidewalk imprint that earned worldwide media attention.

One man has carved a number of natural New Mexico caves into psychedelic sandstone temples.

A onetime gangsters' hideaway where you can dine on steaks, fine wines, and cigars just like they once did.

Literally a million fascinating cartographic artifacts are held in this sprawling university collection.

A Milwaukee museum provides an unsparing and ultimately empowering look at the Black American experience.

What appears to be a wizard's lair in Milwaukee actually houses a massive water pipe.

A group of artists transformed this desolate city alleyway into an outdoor gallery of street art.

A giant, Gilded Age mansion that once belonged to the beer baron of Milwaukee.

An off-the-beaten-path place to literally hang beneath Milwaukee's Holton Street Bridge.

This striking art museum holds an amazing series of curiosity cabinets.

Once a speakeasy operated by Al Capone, this Milwaukee cigar bar is now a haven for ghost hunters.

A factory in Milwaukee where poop is reclaimed… and recycled.

This quirky museum has a collection of more than 15,000 bobblehead dolls.

The bugs crawling down the front of this office building are almost as big as a '68 VW Beetle.

This house renovated by Frank Lloyd Wright was the centerpiece of a lavish 20th-century estate.

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

This cemetery is all that remains of a school for "wayward" girls.

A hidden grotto on the grounds of the Kane County Government Center.

A replica viking ship from the Chicago World's Fair is still in dry dock in an Illinois park.

An exhibit of items from the mental institution where Mary Todd Lincoln lived after her son conspired to have her committed.