The Sea Pines shell ring can be seen near the east entrance to the Sea Pines Forest Preserve. The ring, one of at least 50 known to exist, is in diameter and is believed to be over 4,000 years old. Archeologists believe that the ring was a refuse heap, created by Indians who lived in the interior of the ring, which was kept clear and used as a common area. Two other shell rings on Hilton Head were destroyed when the shells were removed and used to make tabby for roads and buildings. The Green's Shell Enclosure, Sea Pines, and Skull Creek shell rings are listed in the National Register of Historic Places and are protected by law.