A Tennessee Swimming Hole
This hidden-in-the-woods place is "Blue Hole" it is upstream from Greeter Falls in its segment of the South Cumberland State Park. It's located near the town of Altamont, TN in Grundy County just off of higway TN 56. The trail to get here is about .6 miles from the parking area. My wife and I were tempted to stay the whole day.
This picture was used here:
10 Tennessee Swimming Holes You Can’t Miss This Summer