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Some of Chattanooga's oldest and best-loved attractions are 6 miles outside the city at Lookout Mountain. Combination admission includes the Incline Railway, which chugs up a steep slope to the mountaintop; the stunning Ruby Falls (1720 S Scenic Hwy), the world's longest underground waterfall; and Rock City (1400 Patten Rd), a lofty garden marked by dramatic rock formations and a clifftop overlook with views across seven states. You can also purchase a ticket for each of the three attractions individually.
Ruby Falls also offers a 700ft-long zip line on the mountain called High Point Zip Adventure ($20), which includes a 40ft-high climbing tower.