The world's longest known cave system.

A piece of John the Baptist in the American heartland.

This steamer is known as "The ship that built Cleveland."

Cleveland's giant "free" stamp is a nod to the Civil War, but was misinterpreted for years.

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

The world's largest collection of fine-scale miniatures and one the nation's largest collections of antique toys.

Community bookshelf of 25-foot-tall book spines.

Charleston's historic city jail once held everyone from pirates to Civil War POWs.

Georges Seurat’s pointillist masterpiece has been recreated in Ohio in topiary form.

What was meant to be a temporary exhibit is now a permanent fixture at the St. Louis Zoo filled with beautiful birds.

This is not your typical jungle gym.

A diverse, expansive nature preserve in northeastern Kansas.

A tribute to one granddaughter's old apartment which now represents the whims of each visitor.

World's second largest particle accelerator, where nature reveals its secrets.

This recently restored timepiece has stood all around Kansas City.

A cannon designed to fire an atomic warhead.

Look closely and you’ll notice that the color changes a third of the way up the tower.

The oldest university museum west of the Mississippi retains its 19th century feel.

The “American Gothic" artist's largest works hang in an Iowa State University library.

The world’s largest truck stop includes a barber shop, chiropractor, and a huge museum with antique trucks.

This two-room shotgun shack in Tupelo is the birthplace of a King.

Paths are maintained, but trees have taken over plots.

Legend says if you stick your thumb in the hole and it gets wet, your wish will be granted.

Ancient serpentine sacrifice holder that has stood the test of time.