The Tallest Underground Waterfall You Can Visit in the U.S. Is Hidden Over 1,000 Feet Beneath a Tennessee Mountain Peak #Travel You may come to Lookout Mountain for Ruby Falls, but you’ll stay for the scenic views and outdoor adventures.

You may come to Lookout Mountain for Ruby Falls, but you’ll stay for the scenic views and outdoor adventures.<div class="media_block"><a href="https://www.travelandleisure.com/thmb/UKHC7889icak4tu2FAchmJ-hghQ=/filters:no_upscale():max_bytes(150000):strip_icc():format(jpeg)/TAL-lead-image-RUBYFALLS0426-a267daa01fe74b969e385ef0913c1d86.jpg"><img src="https://www.travelandleisure.com/thmb/UKHC7889icak4tu2FAchmJ-hghQ=/filters:no_upscale():max_bytes(150000):strip_icc():format(jpeg)/TAL-lead-image-RUBYFALLS0426-a267daa01fe74b969e385ef0913c1d86.jpg" class="media_thumbnail"></a></div>