Mound Key Archaeological State Park

Above the waters of Estero Bay, the 30-foot shell mounds and ridges of Mound Key is a man-made island covered by mangrove trees. This island’s mounds showered with an abundance of seashells, fish bones and pottery have been around since prehistoric Native Americans created the island. Mound Key was a meaningful site of the Calusa Indians and thought to be its ceremonial center when the Spaniards attempted to colonize Southwest Florida.