the "ancient" midwest

THE earthworks left behind by the long vanished civilizations of the Midwest are harder to spot than the pueblos and kivas of Arizona and New Mexico. For a long time many of them were hidden in plain sight or dismissed as little more than heaps of soil. But the more today’s archaeologists learn about the Midwestern mounds, the more intriguing is the picture that emerges from 1,000 or more years ago: a city with thousands of people just a few miles from present-day St. Louis, a 1,348-foot earthen serpent that points to the summer solstice, artifacts made of materials that could only have arrived over lengthy trade routes.

Ancient Midwest Keith Mulvihill (nytimes)

Something to explore next time I'm in St. Louis.