Rocky Fork State Park is Tennessee's newest state park (at the time of this writing), and I think it must be the crown jewel of the system. There's more than 2000 acres of wilderness, great biodiversity, abundant wildlife and wildflowers (in season), sweeping mountain vistas, impressive cliffs, but most iconically, Rocky Fork Creek, which I think must be among the most beautiful mountain streams in the state. And since half of the Great Smoky Mountains lie in Tennessee, that's saying something.
As soon as you turn onto Rocky Fork Road and head up toward the small (for now) parking area, the creek immediately captivates you, welcoming you on the right side of the road with the pretty cascade shown here.
As you head deeper into the park, it just gets better.
GPS signals can be unreliable here, so if you need help, you can get close by bushwhacking underneath the Rhododendrons up the south side of the creek to a spot about 150 feet upstream of the bridge. Look for a tree at the edge of one of the cascades, with a lovely little downstream-facing hidey hole at its base. If you find a small "cave," you're about 30 feet too far upstream. The cache is a small peanut butter jar, capable of holding small swag and trackable items. It has been approved by the park manager.
All risks associated with seeking this cache are disclaimed by the cache owner and are assumed by the seeker.