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Fort Ancient Ponds:  The design of the Fort Ancient hilltop enclosure was created with ponds as well as earthen walls. Virtual reconstruction by CERHAS University of Cincinnati.

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Fort Ancient Ponds:  The design of the Fort Ancient hilltop enclosure was created with ponds as well as earthen walls. Virtual reconstruction by CERHAS University of Cincinnati.

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Hopewell:  The Hopewell complex in Ross County, Ohio, yielded spectacular artifacts during excavations in the 1890s. Virtual reconstruction by CERHAS University of Cincinnati.

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Newark Moonrise:  Every 18.6 years, the moon rises at its northernmost point, perfectly along the axis of this 2,000-year-old geometric earthwork in Newark, Ohio. Virtual reconstruction by CERHAS University of Cincinnati.

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Turner:  The Turner geometric earthwork complex in eastern Hamilton County, Ohio, had many unusual features, including a complex system of fire chambers and underground flues. Virtual reconstruction by CERHAS University of Cincinnati.