Bruce Myren is a photographer from Massachusetts that is working on a very interesting project called The Fortieth Parrallel.  He is travelling across the United States and taking a panoramic photo where the 40th Parallel of Latitude crosses each Meridian of Longitude at the whole degree.  Here is a google map that indicates each location where he needs to take a photo.  The 40th Parallel officially touches the following states: California, Nevada, Utah, Colorado, Nebraska, Kansas, Missouri, Illinois, Indiana, Ohio, West Virginia, Pennsylvania, and New Jersey.