For the cover to represent to content logically I want to have each side dedicated to its content. The vector artwork side will have a simple map form running from the front to back cover, while the photo journey will have an image of each place involved in the project.
An idea I've had for the photographic cover is to have a small image from each place to sit where that particular places' circle sits. A lot of images will overlap near the midlands as that is where a large amount of journeys end or start...