Lake Jackson Mounds Archaeological State Park preserves one of Florida’s most important archaeological sites, a Fort Walton culture ceremonial center and chiefdom capital inhabited from about 1050 to 1500. Covering about 19 hectares with seven earthwork mounds, a central plaza, and village residences, it grew over centuries into a major political and religious center whose layout and large mounds reflect careful planning and organized labor. Mound 2 likely supported the ruler’s residence, while Mound 3 served mortuary and ceremonial purposes and yielded rich elite burials. Though some mounds were damaged or lost, the site remains a rare reminder of complex Native societies in the Florida Panhandle before European contact.