An eerie smiling woman looms above the granite tombstones.

More than a century after her death, Little Gracie Watson remains one of Savannah's most often-visited residents.

This shallow cave got its name from copious amount of human bones found inside.

Michigan’s most famous shoe tree.

The longest navigable underground river in the United States is home to countless blind and albino animals.

Indiana's oldest sternwheel paddleboat has been plying the placid waters of Webster Lake for 90 years.

An enormous park-like oasis, full of famous Chicagoans' graves.

A strange and haunting monument of unknown origin in the historic Graceland Cemetery.

A set of tall pillars and alcove-like rooms that are significant to the Miami people of Indiana.

The world's longest known cave system.

A building so large that it has its own weather.

Largest magic museum in the United States with more than half a million pieces of memorabilia.

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.

Inside houses a vast collection of military aircraft and missiles spanning the ages.

Deep scars on the earth left by the Ice Age.

These beautiful wineries were at the center of Lake Erie's "grape belt" back when the Midwest dominated American wine production.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

This national park on the shore of Lake Michigan features remarkable dunes that lie at the heart of a Chippewa legend.

A giant concrete egg marks this Indiana town as the "Egg Basket of the Midwest."

This grave marks the final resting place of pioneer John Chapman, better known as Johnny Appleseed.