The magical law of "containment" is a strange magical barrier that folds space back upon itself creating a loop that puts travelers back where they started in the lands. Thus if they were to head north through the great strangeness they will always end up back in the south. From the perspective of the traveler the land seems to connect seamlessly. Geography seen in the distance seems blend into the natural geography. Thus when they actually pass through the barrier itself, they do not notice since it seems as if they are traveling to an actual point that they saw in the distance. So if a traveler was to head north they would not notice when they had actually ended up being transported back to the south. These barriers have been seen in Daventry, Kolyma, Llewdor, and even Tamir.