I can't advise you on where to look, but remember that current satellite images will be quite a bit different in many ways from how any given area on the world's surface looked 2000 years ago. These differences are especially true for river courses and vegetation. In the middle east, for example, many ancient forested regions are now totally deforested and there are huge numbers of small to medium rivers that have been dammed to form reservoirs. The rivers themselves also migrate, especially year-round rivers with wild flow fluctuations like the Jordan, Euphrates, and Nile.