what is the name of a florida park/camping grounds where there is a heart shaped lake,pool,or spring?

I went to this place once when I was young with girl scouts and its a memory that has always stuck out in my mind. I also remember there being a watermill. If anyone knows where I’m talking about, please help me out!

http://maps.google.com/maps?near=Florida&geocode=&q=campground&f=l&hl=en&sll=28.149503,-81.518555&sspn=27.018403,17.929688&ie=UTF8&cd=1&ll=28.102269,-81.953201&spn=0.055573,0.111237&t=h&z=14