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Ericplayzbass · CC BY-SA 4.0
Landmark Americas archaeological

Newark Earthworks

100 BCE – 400 CE · 500 years

Largest earthen enclosures in the world, built by the Hopewell culture in Ohio, including a giant octagon aligned to track the moon's 18.6-year cycle.

Wikipedia

The opening of the article, and a way into the rest of it without leaving the site.

Newark Earthworks on Wikipedia.

Elsewhere in Americas at the time

Records whose own span overlaps this one, found by the same test the canvas draws with. The bar under each card is where it sits inside this one.

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Image credits6 pictures from Wikimedia Commons