Homosassa Springs Wildlife State Park in Florida. Manatees visit many of the states springs in winter, but you can see the gentle giants year-round at Homosassa Springs. Three feeding times daily serve each animal.
Fish Bowl underwater observatory at Homassassa State Park. I love this place and it's a great buy considering the admission is cheap and you can spend 1/2 the day exploring the park with the kids. There is a lot to see here! This isn't your normal State Park :)