I can recall visual "snapshots" of my road and places I know, but I can't hold them in mind or do anything with them, and as far as I can tell those flickers of visual memory are in part reconstructed from facts about those places, general knowledge and other snippets of visual memory. I very rarely don't know where I am or how to get somewhere, but that's based on knowing the connections between places as a network, not visualising a journey.