This is the Serpent Mound, near Chillicothe, Ohio. I named a sweater in Spin To Knit Chillicothe because the i-cord trim at the neck resembled the twistiness of this monument. (Also, it’s fun to say. And the guys who originally found it were from Chillicothe).
However, today I look at this photo and all I see is green. Which is not what I am seeing out my window. Grr — snow!