Wild lights and sound effects turn a walk through some caves into an eye-popping 1960s tourist attraction.

Mile-long cave system near Great Smoky Mountains.

This chestnut box will not be opened until the country music legend's 100th birthday in 2046.

The scant remains of this flooded historic village can be explored in one of the most remote areas of the Great Smokies.

The remains of the iconic train crash from the movie The Fugitive can still be found rusting along the Great Smoky Railroad.

A sculptor's dream castle turned fantastical ruin.

The cruel trial of a 13-year-old boy inspired the creation of this now abandoned reformatory.

A year-long seasonal produce clock highlighting a variety of fruits and vegetables from across the Piedmont region.

These strange large stones served as a campsite and lookout post for generations of Native Americans.

Amazing pre-Civil War ruins alongside a shallow, rocky river that hosts beautiful (but endangered) lilies.

I-95's Tijuana-style celebration of kitsch at the Carolina border.

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

This airfield is home to a number of retired vintage planes in various states of disrepair.

This ceremonial mound is one of the first officially recognized Native American historical sites in North Carolina.

A "hospital" where people went to be quarantined, die, and be buried in the yard.

This cannonball stands as a reminder of the final act of a fleeting governor amidst a revolution.

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

A sign marks the plane crash that caused two nuclear bombs to fall in North Carolina.

A young state senator's deathbed plea to be buried inside a rock resulted in this unusual grave site.

In Costa Rica's cloud forest, the roots of a woody ficus create a botanical bridge.

Sloth rehabilitation center in the jungle of Costa Rica.

These mysterious ancient stone spheres were created by a civilization lost to time and are now mostly lawn ornaments.

Once the foundation for a mansion, these ruins now offer amazing panoramic coastal views.

This Costa Rican topiary park is a surreal garden of unearthly delights.