Enyrion

Enyrion is a large, mostly low-lying region in northwestern Orithea. It is adjacent to the hillier and more elevated region known as Khadoa, and their two names together ("Enyrion and Khadoa") are typically used to collectively refer to all of northwest Orithea on the far side of the Kesh Karkhan from Urem, the Sarpic Seas, Rhydain, etc.
Geographically, Enyrion may be divided into the land of Corumir (its southern half) and the lower Amparûn (its northern half), both of which are predominantly flat and low-lying, with a belt of somewhat hillier terrain running between them and extending to the western coastal highlands of XXXXXX. The western foothills of the Khalkus Mountains and the northwesternmost fringes of the Snowcairns are typically considered to lie on the edges of Enyrion; the ranges proper lie beyond it. 
Belverus and Ilodor are the two biggest kingdoms in Enyrion. Braal, which mostly lies along the coast of Khadoa, also has a sizable southern portion extending down into Enyrion.