ARD-GALEN

In the fiction of J. R. R. Tolkien, 'Ard-galen' ("Green Region"), later 'Anfauglith', was the wide green plain that lay north of the highlands of Dorthonion and south of Morgoth's fortress of Angband in the Iron Mountains, in the First Age.
In the first days after the rising of the Sun, Ard-galen was a green plain with rich grass, reaching from Hithlum and the Ered Wethrin in the west to the Ered Luin in the east, and rising into highlands of Dorthonion in the south. But the plain was laid waste by rivers of flame and poisonous gases that issued forth from Angband in the Dagor Bragollach and renamed Anfauglith ("Gasping Dust").
The Fifth Battle of the Wars of Beleriand, called Nirnaeth Arnoediad (Unnumbered Tears), was fought upon the plain, and the dead bodies from that battle were piled up, forming a hill in the midst of the plain, named ''Haudh-en-Ndengin'', the Hill of Slain, by the Elves, and ''Haudh-en-Nirnaeth'', the Hill of Tears; grass grew again upon the hill but nowhere else in Anfauglith.
Like the other lands around it, Anfauglith sank beneath the waves after the War of Wrath at the end of the First Age.