The other reviews have not noted the remarkable artistic quality of Serpent Mound. I visit earthworks in the Midwest on a regular basis, and have been to most of the major sites. Serpent Mound, with its relaxed, sinuous feel is the only effigy mound that I have seen that still feels like a sculpture. It also incorporates a remarkable visual illusion--when walking around it and looking at the top of it, it looks as if the snake is moving slightly. It's truly a cultural high point, and would be so for any culture.