Gormenghast is a remote and reclusive earldom dominated by the huge Castle Gormenghast at its centre, and ruled by the noble family of Groan since time immemorial. The earldom derives its name from Gormenghast Mountain, and is isolated from the outside world by inhospitable regions on each side of it. To the North are marshy wastelands, to the South are salt grey marshes (and presumably then the ocean), to the East are quicksands and the tideless sea, and to the West are knuckles of endless rock.