The 132-foot waterfall plunges as a near-perfect water column until it crashes onto the rocks at its base. Until 1986, a precarious boulder was perched on the lip of the falls, and in the spring of that year, without witnesses, it plunged to the bottom. Tower Creek has cut through the basalt formation, which make up the walls of the gorge. At the brink of the falls are eerie-shaped minarets or towers sculpted from rhyolitic basalt.