A visualization of three catastrophic floods that led to the creation of the famed Flood Wall.

A collection of outdoor art by renowned muralist Robert Dafford depicts the history of a flooded city.

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

In the Shawnee National Forest, amazing rock formations peer through the treeline.

Speak to a companion on the other side of the room loud and clear through this architectural anomaly.

Fresh wooden posts have been added to ancient holes to recreate a primitive henge clock.

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

An Oklahoma museum that celebrates the history of the "Mother Road."

You were once able to challenge a chicken to tic-tac-toe at this park, which is now converted into the Aikman Wildlife Adventure.

The 40-year-old machine serves soda quicker than you can catch it for a mere 75 cents a pop.

Known as the "Cross At The Crossroads," this massive metal cross is just short enough to avoid the FAA.

Meant for a railway that was never built because of the Great Chicago Fire, these piers still stand nearly 150 years after they were installed.

These molds for fiberglass statues have formed an eerie, accidental sculpture park.

This giant fiberglass sunfish welcomes visitors to Onalaska, Wisconsin, the "Sunfish Capital of the World."

This downtown statue pays tribute to the Native American game that gave the city of La Crosse its name.

Giant six-pack could provide one person a six-pack a day for 3,351 years.

Wisconsin's most celebrated export gets the royal treatment on I-94.

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

America's largest viking stands in a Minnesota city that believes it was visited by the ancient nords.

The statue honors the booming birds Rothsay, Minnesota, is famous for.

With 8,000 pipes this giant instrument is the most versatile theatre pipe organ ever built.

This winding road of 318 curves is a must-visit for (careful) motorcycle and sports car enthusiasts.

The world's largest Holstein cow.

The mayor made the declaration in 2004.