At over 3000 acres, the Sanctuary is the largest and oldest of the Arc of Appalachia's preserves, as well as the organization’s headquarters. It offers over 16 miles of beautiful hiking trails. In the preserve’s heart is the sheer-walled limestone gorge of the Rocky Fork in a karst landscape filled with rock formations, cliffs, springs, and grottos. The Sanctuary offers several overnight lodging options and the Appalachian Forest Museum, which interprets the world significance of the nation’s Eastern Hardwood Forests.