On the western edge of the central Giantwalks is the KneeDeep, a river leadning to a swamp on the high plateau. It gets its name from the fact that the giants in the region treat the swamp as a minor inconvenience, wading straight through. Everyone else has difficulty crossing it, particularly because the swamp’s giant insects zero in on flyers.
It contains the ruins of the only overworld entracne into Underholm