A 30-foot-tall cement chair pays tribute to a historic design and a local industry.

A 56-foot tall statue of the god of fire looks out over Birmingham, Alabama.

Once one of the largest producers of pig iron in the world.

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

The seventh largest spring in the world.

Life-size figures portray depot attendants, train crew, and passengers frozen in time at the oldest railroad station in Arkansas.

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

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

400 million-year old limestone caverns nestled in the Ozarks served as shelter and a hideout for cultures throughout North American history.

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

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.

This life-size bronze statue remembers the tallest recorded human in his Illinois hometown.

Stand at the point where the two mightiest rivers in the United States converge.

Hundreds of graffiti artists have decorated this flood-wall on the west bank of the Mississippi River.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

A kitschy, creepy St. Louis mainstay.

One of the world's earliest skyscrapers.

A creepy sculpture of a decapitated head invites viewers to see St. Louis through its empty eyes.

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

During the 19th-century, this park was a vital trading fort.

One of few surviving standpipe water towers in the U.S.

The eccentric and colorful pavilions of Tower Grove park are a beloved and overlooked symbol. 

This mausoleum is the final resting place of one of St. Louis's richest and most tragic families.