The first Delorme atlas and gazetteer I ever purchased was years ago when my wife and I were planning a trip to the Keweenaw Peninsula (which juts out into Lake Superior from the U.P. of Michigan). Ever since I've made a practice of procuring a Delorme gazetteer before exploring a state. I find them most valuable for that purpose. And so, a few years back, when I knew we were going to be in the greater Phoenix area and were then heading to the Grand Canyon, I figured I would make sure I had an Arizona atlas so I could see more than just what I could observe from the major highways. With this Arizona gazetteer I discovered backroads that aren't found on a regular roadmap, hiking trails and trailheads, and other points of interest. Plus, because these are topographical maps, I knew in advance what sort of terrain we would be getting into before we headed into it. This was especially useful for when we were hiking.