Cesynian Plain

The Cesynian Plain is the extensive area of flat, low-lying coastal plain to the northwest of the Saulean Sea, drained by the rivers Ziva and Ontos (which eventually merge into the Zivontos). It is nearly synonymous with the region of Cesynia, from which it takes its name; another way of defining the Cesynian Plain is simply to say it is the coastal flatland which makes up Cesynia. 
To the west, the plain rises quite abruptly to the high Suagir steppe in a series of scarp-like bluffs; these form part of the vantagelands separating Suagirea from the low-lying regions to the east. It's northern limit is ill-defined, since the nearly flat landscape of the Cesynian Plain transitions into the equally flat Plain of Tethas without any perceptible change in elevation. However, the broad expanse of marshy terrain known as Baajir lies on Cesynia's northern margin and is traditionally considered to form the boundary separating the the two great plains. The Baajiri marshes divide Cesynia’s Ziva-Ontos watershed (the headwaters of the Ontos arise in these marshes) from the vast drainage basin of the River Rhanna. It might be imperceptible to a traveler passing over it, but it is nevertheless a meaningful divide, since on one side of it the creeks and rivulets winding across the landscape will eventually reach the Saulean Sea, while on the other they will find their way to the Thurnic Ocean.