An abandoned meat mecca now serves as an excellent locale for urban exploration.

Man-made geyser that rises to the exact height of the Gateway Arch.

A museum dedicated to man's boldest venture.

The world's largest man-made underground caverns offer unparalleled underwater wonders.

The home used in just a few seconds of film that came to define the setting of a hit sitcom.

Patrick Dougherty's fantastic living tree sculptures, mind-blowing but temporary.

Planes, trains, and automobiles have all been sunk as attractions at this Illinois diving spot.

Even with its slightly risible name this colossal cross is still able to inspire awe.

In the loving memory of a tragically deceased role-player this Illinois park is decked out with both dungeons and dragons.

A floating museum that was sunk by a flood and left to rot in the tides.

A historic house in St. Louis was plagued by a series of suicides committed by family members involved in a successful brewery.

Less a museum than a bizarre fantasy world created by artists and engineers.

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

A European-style bath house in Chicago.

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

Hot Doug's "Hot Dog" Stand.

The palatial McDonald's that inspired Wesley Willis.

A Museum of Holography frozen in 1974.

Honoring Italian greats from Joe DiMaggio to Rocky Marciano.

A curious collection of miniatures in a quiet corner of the Chicago Children's Museum.

Once at the center of U.S. finance, the historic Trading Room was meticulously recreated piece by piece and rebuilt in the Art Institute.

A shining sculpture made of 3,115 lights, the number of visible stars in the Northern Hemisphere.

The final resting place of up to 6,000 Confederate soldiers, the largest mass grave in the Western Hemisphere.

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