Two flush headstones mark the only known graves to be embedded in an airport runway.

An eerie smiling woman looms above the granite tombstones.

A unique museum dedicated to the Gullah-Geechee people, housed within an old oyster cannery.

The "last unrestored grand mansion of Savannah" is now a cramped, mouldering maze of antiques.

One of the largest-ever mental hospitals now sits abandoned, surrounded by 25,000 unmarked graves.

Ruins of a Carnegie family mansion on Cumberland Island.

This bare tree might not have leaves but it is constantly clothed in festive decorations left by mysterious local benefactors.

The uniquely-designed winter home and sculpture studio of Anna and Archer Huntington.

Dedicated to the history of the health sciences.

The only working large-scale tea plantation in the United States.

This recently rediscovered Civil War-era submarine was the first to ever sink an enemy ship.

A rapidly disappearing authentic bit of the old south.

Paths are maintained, but trees have taken over plots.

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

The remains of a chapel created for convenience.

4,000 monkeys used for medical testing on an island off of South Carolina.

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

Amazing pre-Civil War ruins alongside a shallow, rocky river that hosts beautiful (but endangered) lilies.

An unfinished rail tunnel that has since been used to house cheese and bats.

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

"Not too many people can say they've had a nuclear bomb dropped on them, not too many would want to." — Walter Gregg.

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.

One of the oldest living oak trees in the Southeast.