I volunteered in Kentucky two years ago, and although I didn't stay at that park, I wanted to, because...... I THINK....... that park has a "moonbow." It appears on the full moon, something with the waterfall. If that is the park with a moonbow, please check it out and let us know!
JJ, Cumberland Falls State Resort Park has the "moonbow". It is about 50 miles east of Lake Cumberland State Resort Park.