This  Is  The  Oldest  Man  Made  Structure  In  Your  State

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Cahokia Mounds

Built by the Mississippian culture, these mounds date back to 900 AD, serving as ceremonial centers.

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Serpen Mound

An effigy mound representing a serpent, constructed around 1070 AD by Native Americans.

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Newark Earthworks

Built by the Hopewell culture around 100 AD, these geometric earthworks are impressive in scale and precision.

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Aztalan State Park

This site features ancient mounds and a stockade built by the Middle Mississippian culture around 1000 AD.

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Moundville Archaeological

Dating back to around 1000 AD, Moundville was once a major center of the Mississippian culture.

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Watson Brake

One of the oldest mound complexes in North America, dating back to around 3500 BC, constructed by hunter-gatherers.

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Etowah Indian Mounds

These mounds were built by the Mississippian culture around 1000 AD and served as a major center.

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Monks Mound

Part of the Cahokia Mounds complex, it's the largest prehistoric earthwork in the Americas, built around 900 AD.

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Arkansas

These mounds were constructed by the Plum Bayou culture around 650 AD.

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Spiro Mounds

These mounds were built by the Mississippian culture around 1000 AD and were a major center of trade.

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Poverty Point

Built around 1700 BC by a hunter-gatherer society, these earthworks are a UNESCO World Heritage Site.

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Illinois

Built by the Mississippian culture around 1050 AD, this site features ceremonial mounds.

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