It's a pretty creepy lock-up.

Once the largest trading firm of enslaved people in the U.S., this building is now a museum that preserves Alexandria's dark past.

A massive, majestic mammal watches over pedestrians from his perch atop a former B.P.O.E. lodge.

This brick-lined pedestrian walkway was once a railway tunnel used during the Civil War.

The final resting place of the Seminole Indian chief who fought against government occupation in Florida.

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

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

A massive tribute to this small county's top agricultural product.

One of the oldest living oak trees in the Southeast.

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

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

Over 200 people were buried here with only a small stone to mark their final resting place.

Crumbling Kennedys and a decaying Tecumseh are just some of the haunting remains of one man's cement art trail.

The site of the one of the most deadly train wrecks in American history.

This former maximum-security prison is creepy, sobering, and supposedly haunted.

Mass graves and Victorian monuments mark the history of Memphis in this 19th century cemetery.

These early tent-shaped grave coverings are unique to Appalachia.

Mile-long cave system near Great Smoky Mountains.

Three prestigious academic collections come together to create a world-class natural history museum.

A cave dug by a man directed by ghosts to find pirate treasure.

Friction between grains of sand cause a curious "singing" sound.

A museum dedicated to "science, history and the arts" little changed since 1915.

Even Henry David Thoreau found this glacial pothole irresistible.

Beautiful steampunk ghosts of early Massachusetts.