3 ms·

Here are two: https://www.nps.gov/articles/000/cahokia-mounds-state-historic-site-world-heritage-site.htm https://www.nps.gov/articles/000/cahokia-mounds-state

Here are two: https://www.nps.gov/articles/000/cahokia-mounds-state-historic-site-world-heritage-site.htm https://www.nps.gov/articles/000/cahokia-mounds-state-histor... https://en.m.wikipedia.org/wiki/Chaco_Culture_National_Historical_Park https://en.m.wikipedia.org/wiki/Chaco_Culture_National_Histo...

zasdffaa 4y ago
The first is debatable as it's city-ness. But that is an eye-opener! The second, wow! Thanks. I guess the scale both indicate a large social structure.