A natural sandstone bridge nestled within a mature forest in southern Illinois.

These pink granite water slides are the result of millions of years of erosion.

Erosion and time have created a naturally-formed water park.

In the St. Francois Mountains in the Ozarks at 1,772 feet above sea level, Taum Sauk Mountain is the highest (and possibly oldest) peak in Missouri.

Giant granite rocks standing end-to-end like a train of circus elephants.

The only mill in the state that features a covered bridge.

This unusually circular centenarian barn became a Route 66 icon.

The future of roadside attractions is this sci-fi soda mecca that is home to a 66-foot tall neon pop bottle.

The world's largest collection of the world's largest objects is in one small Illinois town.

The world's second largest rocking chair is found on Route 66 in Cuba... Missouri.

Around 50 million gallons of water flow from this spring every day.

It's as if the herds walked straight out of a fairy tale into the Missouri wilds.

Often referred to as the largest spring in America.

The largest riverfront opening cave in the Ozarks.

An underground river pushes more than 200 million gallons out of this Missouri spring every day.

This maze-like slot canyon is a unique gem within an already fascinating geological area.

A delightful park featuring homemade scale replicas of dinosaurs, tucked away in the Tennessee mountains.