One of the major rivers of the known world, the River Kiyaj extends from the Kotthorns in the north to the Galas Sea. It is the traditional heartland of the Liealb people, a historically important group who founded the state of Thearak and dominated the south before falling to an alliance of Krato and the Duroc. The most important city on its banks remains Opios, seat of the Grandpatriarch of Iralliam.