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Public domain
Landmark Americas wonder

Copper Canyon

3000 BCE – still standing

System of canyons in Mexico's Sierra Madre larger and deeper than the Grand Canyon

Wikipedia

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

Copper Canyon 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 credits5 pictures from Wikimedia Commons