The largest earthwork effigy in the world.

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.

A life-sized recreation of the megafauna that once roamed this region is a feature at the birthplace of American paleontology.

A 25,000-square-foot display with dozens of model trains in intricate miniature worlds.

An unusual, super-sized grocery adventure awaits in an Ohio suburb.

Mussolini gave Cincinnati a bronze statue of Romulus and Remus suckling at a wolf's teats.

An art deco ice cream shop covered in vintage tiles.

A bizarre roadside attraction and the first instance of miniature golf in the world.

This funicular railway rumbles along for a mile up the nearly vertical face of Chattanooga’s Lookout Mountain.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

This historic train station has been converted to a locomotive themed hotel.

The 10th-tallest pyramid in the world, this former sports arena is now home to a massive Bass Pro Shops store.

A failed utopian experiment for British expats in the American South is now a Victorian village frozen in time.

Kentucky, Tennessee, and Virginia meet at this point in the Cumberland Gap.

This high point in the Great Smoky Mountains is said to be home to the chief of all bears.

This 19th-century building inadvertently preserved the handprints of its builders within its walls.

The secret city built by the Manhattan Project.

An ode to "The Queen of Appalachia."

A recreation of the doomed ocean liner in the middle of the Smoky Mountains.

While knives are the main feature in this store, visitors will also find dinosaur bones and meteorites.

The physical legacy of one man’s lifetime mission, following a near-fatal mine accident, to publicly proselytize for Christianity.

This improbable contraption was passed down through five generations of industrious Tennesseans.

Knoxville’s architectural icon was the symbol of the 1982 World’s Fair, even catching the googly eye of Bart Simpson.