There's a particular kind of dread that doesn't come from a villain with a name.
It doesn't have a face, or a throne, or a monologue. It doesn't want anything in the way that characters want things. It doesn't scheme, or lie, or betray. And yet it stops characters dead in their tracks, turns them back, breaks them down, kills them slowly, and sometimes kills them fast. It is the land itself. The cold. The dark. The distance. The swamp that swallows your horse and then your hope. The desert that gives you nothing for a hundred miles and then gives you a mirage.