The Great Gulf was a great gulf that once divided Beleriand and the other northern parts of Middle-earth from the unknown south during the First Age. The Great Gulf was created after the destruction of the Two Lamps by Melkor and in the following war, when the Valar widened the great sea Belegaer. The Gulf started at the southern end of Beleriand, and from there flowed east all the way to where later was south Gondor, where a narrow strip of land separated it from the Sea of Helcar.