If you head due west

You start walking west, deciding to just go west until this whole thing makes sense. You walk across the plains for an hour, then you roll up another cigarette and then it's more walking, through the briers and brambles of this wild country. The flat lands just keep on going, and you have now been walking two and a half hours, you stop and rest on a large boulder. You drink from your canteen, it needs to be refilled now.