At least two (not sure if it's all of them) quest that places a new location on the map needs new parameters to stop it from putting that new location in places that are inaccessible such as on a wall of one of those quest locations, or on a cliff.

The quest this happened on was The Path of Wind and Woe. The quest location spawned on the wall of the Imperium.

Another quest that spawned a bunch of fire snakes of some type placed a group of them on a cliff. I don't remember the exact quest.