Thanks for your article on Ginnie Springs. Its clear-water beauty makes it one of my favorite places, so I understand why you liked it so much.
You might check out the night snorkeling there sometime to see if that's something you'd like to do.
Also, after a period of drought, the Santa Fe River runs fairly clear (about as clear as weak iced tea) and you can sometimes find fossils, and maybe, just maybe, even a Clovis point--a 10,000-year-old projectile point from the Paleo-Indian era.
These points were first identified in Clovis, New Mexico. Yet, the same points show up here in Florida, meaning there was a connection between prehistoric people there and here. Check the current state laws about gathering these, though.