This huge pile of volcanic boulders hides a stunning network of secret grottoes.

Inhospitable caverns just beneath this island paradise offer insights into alien worlds.

Not only is this nature preserve the largest protected freshwater island on the East Coast, but it’s also a stronghold of Gullah living.

Take a stroll through this centuries-old tunnel of enormous moss-hung evergreens, nestled among the grounds of America’s first public sculpture garden.

The uniquely-designed winter home and sculpture studio of Anna and Archer Huntington.

A haunting—but not haunted—chapel remains in the woods.

This former hunting grounds that once attracted U.S. presidents and other luminaries. Now it’s a privately owned research reserve dedicated to environmental sciences.

These constructed wetlands naturally filter millions of gallons of treated wastewater every day.

The ruins of an important pilgrimage destination for worshippers of a Maya fertility goddess.

These winged Maya figures are the subject of speculation and conspiracies.

South Carolina's last remaining slavery auction house is now a museum devoted to its own tragic history.

Visitors come from all over to bring gifts and tokens to the grave of Alice, who is thought to have died of a broken heart.

Despite being burnt down multiple times, the ruins of this South Carolina church are still standing.