>>12317300One thing that's not taken into consideration there, but I'm a bit too confused to say if it actually is a route is that that mountain range in the southwest seems to have two openings in it that aren't touched upon, but then again, the whole south end of Kalos doesn't seem to have much going for it.
There's also that one weird tree near the forest in the southeast, but that's probably just an area you can go to within that forest.