There could be a no mans land in the middle of the map the most bizzare weather happens, like an equivalent of the Bermuda Triangle where the thickest fog is found, time traveling storms (teleports you somewhere ahead of your current heading, I mentioned this earlier) weird Aurouella Bellis type effects, strong winds etc,
Now you are all thinking these are crazy ideas, but this is a weird planet that could have special atmospheric conditions that we don't know anything abou