The 61.55 acre Crystal River Archaeological Zone (8CL1) is located on the Crystal River within the Crystal River Preserve State Park. It is a National Historic Landmark and contains at least six mounds. This important Native American occupation site is located on the Central Gulf Coast of the Florida Peninsula, about 92 miles north of the mouth of Tampa Bay and 20 miles south of the mouth of the Suwannee River. It is possible to canoe on the Suwannee River to the Okefenokee Swamp in Georgia then on the St. Marys River to the Atlantic Ocean. This was a major trade route in pre-European times. The entrance to the park is about two miles northwest of the town of Chrystal River, off of US 19/98.
The 211 acre Pineland Archeological District was listed as a historic district on the National Register of Historic Places on November 27, 1973. It is located on Pine Island within the Pine Island Sound in Lee County, Florida. The archaeological zone is adjacent to Pine Island Sound. Pineland Archaeological District contains medium-to-large sized shell and sand mounds, pre-European canals, earthen platforms, artificial ponds and effigies created from sandy soil. Many small mounds and occupation sites were destroyed by real estate development during the past 150 years.
The Lake Okeechobee region contained some of the most sophisticated indigenous cultures that ever existed north of Mexico. Its towns built large earthworks and ponds in the shape of the ceremonial scepters carried by leaders in the Southeastern Ceremonial Mound Culture, but they were built several centuries before the Southeastern Ceremonial Mound Culture appeared elsewhere. Its engineers constructed several hundred miles of canals and raised causeways to interconnect the towns. They even built locks to enable cargo canoes to bypass rapids. Yet despite all this cultural precociousness, so far there is no evidence that the people of South Florida ever practiced large scale agriculture. However, intensive cultivation of raised garden beds in a semi-tropical climate, also a practice of the Mayas, may have produced a far higher percentage of their diet than anthropologists currently presume.