Once connected to the outside world by a single train track, this ghost town is looked after by the National Park Service.

The trials and tribulations of marking Poe's grave.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

This symbolic piece of New Orleans architecture is also home to a few ghastly stories.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

The world's longest known cave system.

This magnificent Cincinnati graveyard is also a popular public park.

This tower-tomb honors a president who only held office for a little over a month but dedicated his life to his country.

A castle built by an eccentric medieval enthusiast in rural Ohio.

The largest earthwork effigy in the world.

A beautiful geyser under environmental threat.

The oldest cemetery in New Orleans, resting peacefully for over 200 years now.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

A 200-year-old bar in the historic French Quarter refuses to give up its place in history, nor its role in securing ours.

The final resting place of New Orleans' most famous voodoo priestess.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

The first declared National Monument in the United States.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

The tomb of Increase Mather and his son Cotton, influential colonial ministers obsessed with the occult.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.