Through the cellophane waters of Florida's freshwaters springs, the underbelly of an American alligator looks decidedly vulnerable. Not only a haven for aquatic wildlife, the nourishing springs attract families year after year for tubing, swimming, and diving in its clean and clear waters.

(Text adapted from and photograph shot on assignment for, but not published in, "Unlocking the Labyrinth of North Florida Springs," March 1999, National Geographic magazine)