Rainbow Springs

Rainbow Springs, the swimming area
Rainbow Springs "submarine" sightseeing boat where passengers sat below the waterline looking out underwater windows around 1970
monorail ride at Rainbow Springs attraction around 1970
The Rainbow Springs monorail around 1970, this is near the end of the ride where it comes low to the ground near where people get on or off
The Rainbow River Path

Rainbow Springs, formerly known as Blue Spring, is a first-magnitude artesian spring formation in Marion County, Florida, United States, several miles north of the city of Dunnellon. Rainbow Springs is the focal point of Rainbow Springs State Park. The spring formation is the fourth-largest in Florida, and produces over 490 million gallons of water daily. Rainbow Springs forms the headwaters of the Rainbow River, which empties into the Withlacoochee River.