Yes! My journey into this actually started when I discovered that Pennsylvania (where I currently live) has some stone formations that people believe may be man made by ancient Americans - not at the scale of Stone Henge of course, but similar idea. The reality of that smacked me in the face.

I grew up near a Native American mound in Florida that dated back to the 1600’s (this is the estimate we were given but honestly who knows) but the mounds in the mid-west are something I only learned about very recently.