The site of Cahokia, located just outside of St. Louis, is home to the largest earthen pyramid in the United States. But amazingly, it had a sister city roughly 360 miles away, now
Northeast Iowa is home to one of the largest concentrations of ancient mounds in the US, many of which are now located in Effigy Mounds National Monument. Established as a protected area in 1949,
The state of Illinois is home to one of the most significant and impressive archaeological sites in all of the United States: Cahokia, known for its large earthen pyramid. But like its neighboring