What makes this particular cavern unique besides its size is its west edge is a powerful underground river. You can explore most of the cavern except for this area where the current can pull you toward the main spring. Like many of the springs in the area, Catfish Hotel is normally covered by a layer of duckweed which can create some spectacular lighting effects. You will be taken to a point near the Rainbow River head spring. Here you may snorkel before beginning your trip downstream.
Rainbow River is actually a spring run.
The visibility is near perfect and depths range from 10 to 25 feet as you drift along with the current. Along the way you'll stop at various depressions where spring water is coming from cracks, crevices or sand boils. You'll also probably run into a school of Florida Gar. These docile animals can reach lengths of up to five feet. This small sinkhole opening located among lush, tropical vegetation gives the diver little idea to the size of the cavern below.