This first magnitude spring is not just one large vent, but it is a system of numerous vents that issue 400 - 600 million gallons of crystalline water every day. Archaeological evidence indicates that the waters of the Rainbow River have attracted and sustained human inhabitants for over 10,000 years. The crystal clear water, abundant with fish, wildlife and vegetation, maintains a constant water temperature of 73 degrees.

The entire Rainbow River was designated as a "Registered Natural Landmark" in 1972, an "Aquatic Preserve" in 1986, and an "Outstanding Florida Waterway" in 1987.