Tuckaleechee Caverns – 25 miles west of Gatlinburg on US 321 & TN 73. One of the greatest natural attractions of the Great Smokies. View millions of formations along the 1.25 mile adventure, including 210-foot Silver Falls and BigRoom which is almost large enough to house a football stadium. Open March-November: 10am-6pm April 1-October 31, 10am-5pm March & November. Rated a Diamond attraction by AAA. (865) 448-2274.