Georgia is located in the northern and western hemispheres of the Earth on the North American continent. It is in the southeastern region of the United States. Georgia has five geographic regions - the Appalachian Plateau, Valley and Ridge, Blue Ridge Mountains, Piedmont, and Coastal Plain. Key physical features that have influenced Georgia's development include the Fall Line, Okefenokee Swamp, Appalachian Mountains, Chattahoochee and Savannah Rivers, and barrier islands along the coast.