The Tallulah Gorge is a gorge formed by the Tallulah River cutting through the Tallulah Dome rock formation. The gorge is approximately 2 miles (3 km) long and almost 1,000 feet (300 m) deep. The Tallulah Gorge is located next to the town of Tallulah Falls, Georgia. Tallulah Gorge State Park protects much of the gorge and its waterfalls. The gorge is one of the Seven Natural Wonders of Georgia.

A canyon, gorge or chasm, is a deep cleft between escarpments or cliffs resulting from weathering and the erosive activity of a river over geologic time scales. Rivers have a natural tendency to cut through underlying surfaces, eventually wearing away rock layers as sediments are removed downstream. A river bed will gradually reach a baseline elevation, which is the same elevation as the body of water into which the river drains. The processes of weathering and erosion will form canyons when the river's headwaters and estuary are at significantly different elevations, particularly through regions where softer rock layers are intermingled with harder layers more resistant to weathering.