Hidden for 165 years inside a building designed by Thomas Jefferson are the remains of what may be America's first educational chemistry lab.

One of the last active volcanoes on the Eastern seaboard.

Atlanta's strange assortment of concrete pillars inspires reflection in some, confusion in others.

This abandoned church languishing for decades is now one man's passion project and subject of paranormal investigators.

Hikers can still stroll beneath the long conveyer of this abandoned mining facility hidden in a West Virginia river gorge.

A historic coal mine that doubles as a museum and tourist attraction.

You can climb to the summit of Black Mountain, as long as you sign the waiver.

This maze-like slot canyon is a unique gem within an already fascinating geological area.

This simple convenience store sits on the location where the Ouija board was named—and has a plaque to prove it.

The man who first patented the Ouija board rests in peace beneath a headstone that playfully reflects that achievement.

Live data is transmitted from the Atlantic coast to instantly recreate the ocean waves in this fountain at the NOAA headquarters.

Outdoor exhibits explore the contributions of European, African, and indigenous peoples to American frontier culture.

This historic mansion was built as a symbol of love between a husband and wife.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

This South Carolina water tower is an icon of the city of Walterboro, but it also once served as the county jail.

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

Giant busts of 42 U.S. presidents are sitting in a field in Virginia.

Heron, whitewater rapids, and urban industrialism all add to the beauty of this concrete nature walk.

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

Inspired by a foil-wrapped potato, (seriously) the Markel Building has been deemed one of the 10 ugliest buildings in the world.

The remains of a failed attempt at medieval nerdery are hidden deep in the woods of Virginia.

A memorial dedicated to a highly decorated Marine and Korean War veteran, who also happened to be a horse.

The secret city built by the Manhattan Project.

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