The site of an ancient Mississippian settlement that appears to have flourished during the 10th to 13th centuries.

These modest Midwestern formations are kin to Niagara Falls' impressive cliffs, more than 600 miles away.

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

The empty tomb that houses the memories of Roy Bertelli's revenge.

The original vault that held the president's remains still stands, empty, not far from where he was finally buried.

When you visit his grave, be sure to rub the Great Emancipator's nose for good luck.

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

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

Since it formed millions of years ago, this cave system has been a sacred burial ground, a Prohibition-era speakeasy, and the center of an amusement park.

The highest point in Alabama was almost completely deforested, but is now home to protected towers and trees.

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

A six-story-tall golden pyramid, surrounded by a moat.

"World's largest scrap metal sculpture" stands in an outdoor sculpture garden in the middle of Wisconsin.

A spectacular remnant of an Adler and Sullivan masterpiece that was destroyed in 1972.

These pretty kitties killed and ate as many as 135 railway workers.

Years of archaeology, just chillin' by the water cooler.

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

At Chicago's revered Field Museum, visitors are invited to learn about and literally explore DNA.

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

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

A wonderland of caves in eastern Iowa.

This large midwestern cavern features impressive rock formations and an underground waterfall.

A pop-culture attraction outside of Dyersville, Iowa, hits a home run.

Chilly air billows out from the entrance of an abandoned mine on a steep hillside, providing a refuge for Ice Age fauna and flora.