Ruby Falls in Chattanooga, Tennessee is an underground waterfall attraction inside a cave system that visitors can experience through guided tours. The experience involves a half-mile walk through lit cave passages to reach the main waterfall, which features a choreographed light show presentation. While some visitors find it touristy, the site offers amenities like free parking, a gift shop, and a café in the castle-like building, though tour groups can be large and the pace of tours varies depending on crowd levels.

Ruby Falls, located in Chattanooga, Tennessee, is a stunning subterranean waterfall that draws visitors from far and wide. Visitors seem to enjoy the unique underground experience, though some mention encountering interesting characters during their adventures. The waterfall appears to be a popular tourist destination that shares similarities with other underground cave systems, making it a noteworthy stop for those exploring the area.