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

One of the few surviving "Wigwam"-themed motels.

The world's longest known cave system.

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

You have to love a museum with a truly dedicated focus. A focus on Superman, for example.

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

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

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

Whether his story is true or not, Stiffy Green is the most beloved bulldog in all of Indiana.

Historians and hobbyists head to this former French outpost for the annual Feast of the Hunters' Moon.

For over 100 years, this Indiana town has had a tree growing out the top of the local courthouse.

A singular collection of hand-built art deco cars are held in a building with style to match.

A chilling disappearance (and rescue) of a child uncovers a geological mystery.

The farm where one of America's greatest leaders was raised is now a well-appointed landmark.

You thought Santa Claus didn't exist, but it turns out you were wrong.

This museum collects over a century of automobile history including the iconic car from The Muppet Movie.

The only freestanding table rock formation east of the Mississippi.

Modeled after the labyrinth in Chartres Cathedral, this small-town Indiana memorial labyrinth sits half a world away.

A turn-of-the-century architectural marvel built on healing mineral springs and salt licks.

A medical facility that has been kept frozen in time.

A real flying saucer, contracted by the U.S. Air Force.

You can walk through the first Boeing Air Force One, which famously carried JFK's casket from Dallas back to D.C.

The world's tallest doric column is this Ohio monument to a naval victory in the War of 1812.