Rainbow Springs State Park, State park at a first-magnitude spring in Marion County, Florida, United States

Rainbow Springs State Park is a large natural area in Marion County with multiple springs that flow year-round and create clear freshwater zones. These waters connect to streams that feed into a larger river system.

Known as Blue Spring until the 1930s, the site was then developed as a private tourist attraction, with submarine tours of the springs and mermaid shows in the 1950s. The attraction closed in the 1970s, and the State of Florida acquired the headwaters in 1990, saving them from development. Volunteers from the community did much of the work to open the state park.

The site was called Blue Spring until the 1930s, when a promoter renamed it to stand apart from other Florida springs. Submarine tours once ran here to rival Silver Springs' glass-bottom boats, and mermaid shows drew crowds in the 1950s. A small zoo in the gardens is gone, though some of its structures remain.

Visitors can rent canoes and tubes on many days throughout the year, with swimming available in designated areas at any time. Water conditions are most favorable during warmer months, though the clear water remains accessible year-round.

The headspring basin is fed by several vents rather than one large bubbling spring, which is why the water looks like a mirror. The site was called Blue Spring until the 1930s, when a promoter renamed it to stand apart from Florida's other Blue and Wekiwa springs.