Mammoth Cave - River Styx tour

We left the Mammoth Cave area on a Sunday morning. During our time there, we took the River Styx tour, in addition to the Violet City Lantern Tour. Here's the description: Trace the stages of cave development from solid layers of limestone into the world’s longest known cave system. Follow the course of the water from ridge top to river bottom and witness the persistence and power required to create this geologic marvel. Experience some of the largest continuous canyon passages on the planet, smooth elliptical tubes and beautifully sculpted shafts. Working your way to the cave’s lowest level you’ll be able to peer into the cold river water that still hollows out the limestone and lengthens the cave system. Understand the processes of both the surface and subsurface and realize how all of the pieces of the puzzle fit together to make the story of the world’s longest cave unfold before your eyes. It was pretty "cool" (neat and 58 degrees) When we made it to the river, we were able to shine the flashlights into the water and see the blind, white cave crawfish.