The document summarizes several key physical features in Georgia and their importance: The Fall Line marks the boundary between the Piedmont and Coastal Plains regions, containing many waterfalls that caused travel issues historically. Cities like Columbus, Macon, Milledgeville, and Augusta became centers of commerce where rivers crossed the Fall Line. The Okefenokee Swamp is the largest swamp in North America, protecting over 400 species of animals. It was made a national wildlife refuge in 1937 to prevent logging of old-growth trees. The southern Appalachian Mountains extend through Georgia, containing the state's highest point. The mountains receive over 80 inches of rain annually, providing important fresh water