There are two Blue Springs in Florida. The one in Volusia County is 5$ per car I think. The other is in NW Florida. If you goto Blue Springs, there are some really good photo opportunities such as Hontoon Island, DeLeon Springs, in the area of Blue Springs.
A word of advice, some get quite packed in the warm months, especially on he weekends, so hey can get silty. The best times to go would be as soon as they open (or a little later for better light) during a weekday. Also, swimming at Blue Springs closes for manatees this time of the year till March'ish.
Divers frequent Blue Springs, kick up silt at the boil, but might be interesting subjects.
FDEP springs list :
SJRWMD list (check other WMDs as well):
Get a state park pass if you are staying for a while too, it is nice to have if you like to spend time outside.