Blue Spring State Park in Orange City, Florida, is a wonderful hidden gem. You can take a peaceful nature walk through the park. The spring is home to many manatees that call this place home during the winter months.
Wakulla Springs State Park. The spring at the lower edge of the photo is 175 feet deep, and the water is crystal clear. Alligators, manatees & tons of other wildlife abound. As an interesting side note, they filmed "The Creature from the Black Lagoon" and three Tarzan movies at the spring and in the park. (Tallahassee Democrat - September 2007)