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

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

An abandoned village that doubled as "The Hunger Games"' post-apocalyptic wasteland is up for grabs.

The perfectly named cave drop is the deepest in the continental United States, almost matching the height of Seattle’s Space Needle.

These ancient ritual mounds are our best window into the culture of the ancient Mississippians.

Crumbling ruins mark the site of a couple's grisly murder in the woods.

Live long and prosper in Tennessee.

One of the world's largest automobile junkyards is a unique landscape of metal and moss.

A man's home is his castle.

A failed utopian experiment for British expats in the American South is now a Victorian village frozen in time.

A cabin completely covered in coffee mugs, where visitors are welcome to leave one of their own—if they can find an empty nail.

A white oak with property rights.

After just one epic test blast, this literal loose cannon proved too explosive for combat.

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

A mysterious monument meant to be a guide into "an Age of Reason" was destroyed after an apparent bombing.

The remains of one of America's first radiation testing grounds still rest ominously in a Georgia forest.

A mysterious inscription may hold a clue about the "Lost Colony" of Roanoke.

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

This improbable contraption was passed down through five generations of industrious Tennesseans.

The secret city built by the Manhattan Project.

Practice your Dirty Dancing lifts in the manmade lake where Johnny Castle himself did.

They call this long foot bridge a swinging bridge, but really it's the bouncing you have to watch out for.

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

A wonderland of folk art including the World’s Largest Grit.