Due to some aggressive expanding (AKA war of conquest), I suddenly have caravans running to and from new places. One of those caravans just went right through a Haunted Land (one of those quest areas).
Entering one of those lands should be a conscious decision, not simply a caravan blundering into it. Also, why did the road run right through it? Now, those units are slowly leaving that land and will be marauding my borders soon I guess.
