This Florida sinkhole hides a rainforest-like micro-environment in its depths.

North Central Florida's largest flea market and a weekend roadtripper's dream.

Discovered by a soldier during the Revolutionary War, these springs helped create an iconic South Carolina ginger ale.

A former Oz-themed attraction that has fallen into disrepair, but still holds some of the original magic.

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

A Nessie-like monster supposedly lurks in this lake.

A historic covered bridge, only one of two remaining in North Carolina.

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

The first statue of Christ sleeping on a bench in the United States confused its affluent parish.

This limestone outcropping was once a ceremonial site for ancient Native Americans.

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

All that's left of the quintessential "cabin in the woods."

This ghost town houses the remains of Alabama's old state capital.

What else would you call a playground hidden in Alabama's oldest and largest cemetery?

Railroad came. People came. Railroad left. Town died.

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

Labor provided by Great Depression-era programs restored these 25,000 acres in Tennessee.

One of the Cemestos prefab homes built to secretly house thousands of Manhattan Project workers.

This hotel was used during the Manhattan Project to house official visitors.

The secret city built by the Manhattan Project.

John Hendrix predicted the creation of the "Secret City" built as part of the Manhattan Project.

This scented city oasis was a labor of love.

Better known as the "Body Farm," this unique research facility has been studying how human bodies break down since the 1980s.

North Carolina's finest examples of Native American pictographs have survived for 5,000 years.