Ozark Trail Let National Geographic magazine take you to Ozark Highlands National Recreation Trail, a hiking route that crosses mostly through the vast Ozark National Forest.

Deep Southern Caves Hard-core cavers in three southern states stop at nothing to probe an underworld wilderness.

Threatened Sanctuaries National parks have an aura of sacred permanence as places that society has chosen to set aside and protect forevermore. But how long is forevermore?