A maze of man-made chambers, walls and ceremonial meeting places, America's Stonehenge is one of the oldest man-made construction in the United States. Carbon dating put it at over 4000 years old. Archaeological Excavation at the site has uncovere d an amazing range of historic and pre-historic artifacts-from stone tools, pottery and ancient old world scripts to 18th and 19th century house wares, and manacles possibly removed from slaves who used the site as a stop on the underground railroad in the 1830's and 1840's. Along with it's astronomical alignments, America's Stonehenge continues to be one of the most fascinating archaeological discoveries of the century.