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.