Stonehenge, in England, has long been a source of fascination for most of us. It is credited as being an archaeoastronomical site – an ancient site for astronomical observations. I recently posted articles on “Medicine Wheels” that have a similar purpose. This week, I want to write about circles built by the Hopewell culture that also suggest astronomical purposes. Nicknamed “Woodhenge” because of their similarity to Stonehenge and Woodhenge in England, these sites are east of the Mississippi River and were built by the Hopewell Indians living from around 200 A.D. to around 1,500 A. D.