Category: Earthworks
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Cahokia Mounds, Collinsville
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Dowth, County Meath
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Gamla Uppsala
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Hill of Tara, County Meath
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Knowth, Ireland
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Krakus and Wanda Mounds, Krakow
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Newgrange, County Meath
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Ocmulgee National Monument, Macon
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Serpent Mound, Ohio
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Silbury Hill, Wiltshire