Tens of thousands of Native Americans lived in this city 1,000 years ago, and it was the center of the Mississippian culture that thrived in the valley and as far as Ocmulgee in Georgia. In the distance from atop 100′ high Monks Mound (named for French Trappist Monk settlers), you can see Gateway Arch. This is the largest Native American mound north of Mexico, and it is still an impressive, tiered, geometric structure surrounded by 50 other smaller mounds of different shapes and sizes, for burials and as foundations for public buildings. There’s also an astrological calendar circle with wooden post markers, called “Woodhenge”.

Cahokia is actually both a state park and a UNESCO World Heritage Site but not a national park site. However, it is on the Lewis & Clark National Historic Trail, and Illinois’ Senators have asked President Biden to make it an official national park site. It’s simply too big to ignore, so, I stopped and climbed, even though the visitor center is closed.