This Way There Be Dragons by Berni Wrightson

Yeah, looks like all the ancient maps say "Here There Be Dragons," but imagine my line above an ornate arrow pointing off the map.  Or, maybe since the world was flat and there was nothing past the edge, my verbiage couldnae have occurred.  Except for the first image, I've seen all these before, but there's sumpn sumpn about that first image