Mexico and Central America have plenty of ancient, monumental structures (e.g., Chichen Itza). But the continental US and Canada do not. Why?
In: Engineering
Maybe you weren’t aware of [pueblo-bonito](https://www.nps.gov/chcu/planyourvisit/pueblo-bonito.htm)
Or the ancient dwellings in Arizona
https://www.arizonahighways.com/article/cultural-parks
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