Two thousand years ago, people of an advanced culture gathered here to conduct revered ceremonies. In the Chillicothe area, which contains an extraordinary number of giant earthwork complexes, Hopewell Mound Group was perhaps the most important and, at nearly 130 acres, the largest earthen-walled enclosure. Native Americans of the Hopewell Culture built at least 40 burial mounds and over 2 miles of earthen embankment walls, created the largest single earthen-walled enclosure they ever built at over 110 acres, added a nearly perfect square to the east wall with possible alignments to the sun and moon, and constructed their largest burial mound, Mound 25, a 500-foot-long, 30-foot-high, triple-peaked monument that required about a million and a half basketfuls of earth. They also crafted and buried the most impressive set of Hopewell artifacts ever discovered, including some of the culture's most iconic art, such as the mica hand found in Mound 25. The artifacts found here were so impressive that the entire culture, which stretched from the Great Lakes to the Gulf of Mexico, was named after the landowner of this site, Mordecai Hopewell. The true names of these tribes have been lost to time, and because these people had no known written language, the culture has left many awe-inspiring mysteries.