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

This huge clock made of flowers and simple machinery was once used a political weapon.

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

This former tuberculosis research hospital endeavored to cure the dreaded disease with fresh air and positive attitudes.

This Tennessee manse was built so opulent that the very utilities doomed it to fail.

This replica of the Greek structure is in the heart of Nashville.

Enormous lake at the bottom of a unique cave system.

The secret city built by the Manhattan Project.

The oldest bridge in South Carolina may have been designed by the same man who created the Washington Monument.

Practice your Dirty Dancing lifts in the manmade lake where Johnny Castle himself did.

Oldest unrestored plantation house in America that is open to the public.

One of the oldest living oak trees in the Southeast.

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

South Carolina's last remaining slavery auction house is now a museum devoted to its own tragic history.

Settled in 1696, abandoned after the Revolutionary War.

Despite being burnt down multiple times, the ruins of this South Carolina church are still standing.

This abandoned amusement park was built on a site with a dark history.

This structure among the trees was the result of divine inspiration.

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

Moonbows over Kentucky.

An abandoned village that doubled as "The Hunger Games"' post-apocalyptic wasteland is up for grabs.

A 300-yard long natural tunnel runs through a ridge deep in the Appalachian Mountains.

This road in the Great Smoky Mountains was supposed to assuage a displaced community, but ended up a $52 million dead end.

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