Ozone Falls State Natural Area is a state natural area in Cumberland County, Tennessee, located in the Southeastern United States. It consists of 43 acres (0.17 km2) centered around Ozone Falls, a 110-foot (34 m) plunge waterfall, and its immediate gorge along Fall Creek.
The area is managed by the Tennessee Department of Environment and Conservation and maintained by Cumberland Mountain State Park. Migrants crossing the Cumberland Plateau en route to the Nashville area in the early 19th century wrote of Ozone Falls in journals and letters sent to relatives back home.
The waterfall was located adjacent to the Walton Road, which was part of the stage route connecting East and Middle Tennessee (the road closely paralleled what is now US-70). One traveler along this road, Elijah Haley, died while passing through the area in 1806. His widow established a tavern at what is now the community of Ozone shortly thereafter, and later helped operate the Crab Orchard Inn at Crab Orchard, a few miles to the west. The waterfall was known as McNair Falls throughout the 19th century, named after a local miller who operated a grist mill at the waterfall in the 1860s. In 1896, the community of Mammy, which had grown up around the Haley tavern, changed its name to "Ozone", and the name was subsequently applied to the waterfall.
The name reflected the high quality of air in the community, which may have been enhanced by the waterfall's mists. The Ozone Falls State Natural Area was established in 1973, and originally consisted of 14 acres (57,000 m2). In 1996, it was expanded to 43 acres (170,000 m2).
Because of its picturesque beauty and easy access, Ozone Falls was selected for filming scenes for the movie “Jungle Book.”