Grassy Cove Karst Area. The largest sinkhole in North America as seen from Brady Bluff. Grassy Cove, TN. 6 x 3 miles wide. Water drains through numerous caves underground. National Natural Landmark. March 20, 2026.
Piney Falls and its fun scrambly trail. The area is a National Natural Landmark for its “rare virgin mixed mesophytic forest stand representative of the primeval eastern deciduous forest biome” (NPS). March 20, 2026.
Forest City National Recreation Trail. Located at Watts Bar Dam near the Watts Bar Nuclear Plant. Short paved walk through some trees. March 20, 2026.
Dale Hollow Dam Area National Recreation Trail. Half-mile paved loop through trees by the campground. Celina. March 22, 2026
