The Preserve contains 230 acres of natural forest, including sand pines, oaks, magnolias and hickory trees, a 40-acre dune lake, as well as swamps, bogs and marshes.
Lake Fuller is a very rare dune lake, fed by rainwater and groundwater seepage; it drains by natural outlets into the Gulf of Mexico. The only dune lakes in Florida are located in Walton County. It provides water filtration, flood control, and a source of fresh water for many plants and animals.
Lake Fuller is about 8 feet deep of tannin stained dark water and contains many aquatic plants such as water lilies, reptiles such as alligators, and provides nesting habitation for birdlife.