Cumberland Island is the largest and most beloved of the Georgia barrier islands. Although it can be reached only by boat, more than forty thousand people make the trip each year to enjoy the island's natural splendor and solitude. As on most barrier islands, human activity has long been a shaping force on Cumberland. It is among the few islands, however, that we have let return to a relatively natural state. With its expansive oceanfront beaches, dunes, interior maritime forests, freshwater ponds, tidal creeks, and salt marshes, Cumberland is all the more special for its restored natural...