Nan Elmoth

In the fiction of J. R. R. Tolkien, Nan Elmoth was the forest in Beleriand east of Doriath and south of the River Celon[?].

Melian enchanted Thingol in Nan Elmoth, before they went to Doriath. Later the trees grew to be the tallest and darkest in Beleriand, blocking the sun entirely from the forest floor, and Eöl the Dark Elf dwelt there.