 Logging has also been an important part of the Upland South's economy.The region became the United States' primary source of timber after railroads allowed large scale industrial logging in the late 19th century and early 20th century.Today, the historic importance of the Upland South's forests can be seen in its many national forests, such as Cherokee National Forest in Tennessee, Nantahala National Forest in North Carolina, and Daniel Boone National Forest in Kentucky, among many others.