Haynes Bluff originally consisted of one large and three smaller platform mounds surrounding a plaza. Mounds A and C remain, while Mounds B and D were destroyed in 1967. Mound A, the largest at the site, was originally 30 feet tall and has a ramp extending towards the south. The mounds were built by Native Americans beginning in the Coles Creek Period, ca. AD 850, and continuing well into the 18th century. The latest mound stages contain glass beads and other trade items of European origin.
