Hamilton Township, United States of America
The Stubbs Earthworks (33 WA 1) (also known as Bigfoot Earthworks and Warren County Serpent Mound) was a massive Ohio Hopewell culture (100 BCE to 500 CE) archaeological site located in Morrow in Warren County, Ohio.
Listen to the audio guide for Stubbs Earthworks Free on WIP — starts by itself when you arrive, even with the screen off