Mound Key Archaeological State Park
Framed in forests of mangrove trees, the shell mounds on Mound Key rise more than 30 feet above the waters of Estero Bay. The highest elevation for miles around, the island is almost entirely an artificial creation, resulting from nearly 2,000 years of human activity. Mound Key is a beautiful place for nature study and to observe Calusa midden mounds. A three quarter-mile trail traverses the island across several mounds and through mangroves and a tropical hardwood hammock.