Although many studies have been carried out on Stonehenge this one is very different, both in its approach and its methodology. GIS is used to explore the Stonehenge environs in 3D and to analyse the changing relationship between monuments and the landscape from the Mesolithic through to the Early Bronze Age. The CD-Rom allows you to view the distribution of sites in relation to the topography, with control over the location and direction of your viewpoint, and also to study intervisibility between sites. The still photographs provide real' views of the sites, in contrast to the 3D images which make the landscape seem rather artificial. Additional data, both original and processed, are given on a CD-Rom which also repeats the text from the book, but with many more images.