Tennessee Code Title 11. Natural Areas and Recreation § 11-14-105

(1) Class I, scenic-recreational areas, which are areas associated with and containing waterfalls, natural bridges, natural lakes, small but scenic brooks or streams, gorges, coves, woodlands, caverns or other similar features or phenomena, which are unique in scenic and recreational value and not extensive enough for a state park but worthy of perpetual preservation; and

(2) Class II, natural-scientific areas, which are areas associated with and containing floral assemblages, forest types, fossil assemblages, geological phenomena, hydrological phenomena, swamplands and other similar features or phenomena which are unique in natural or scientific value and are worthy of perpetual preservation.