As stated in the title, this book is primarily intended to guide the readers into understanding a famous prehistoric archaeological site called the Great Serpent Mound, located in Ohio, United States. The Great Serpent Mound is a 1,348-foot-long (411 m), three-foot-high prehistoric effigy mound. It is named that way because when seen from an aerial view, the effigy mounds are shaped like a large snake.