Is Arda round?
“Now the summit of mount Minul-Tarik (Meneltarma), the pillar of heaven, in the midst of the land was a hallowed place, for there the adnaim had been wont to give thanks to ru, and to adore him; and even in the days of Zigur (Sauron) it had not been defiled. Therefore many men believed that it was not drowned for ever, but rose again above the waves, a lonely island lost in the great waters, if haply a mariner should come upon it. And many there were that after sought for it, because it was said among the remnant of the Adnaim that the far-sighted men of old could see from the Minul-Tarik the glimmer of the deathless land. For even after their ruin the hearts of the Adnaim were still set westward; and though they knew that the world was changed, they said: ‘Avallone is vanished from the earth, and the land of gift is taken away, and in the world of this present darkness they cannot be found; yet once they were, and therefore they still are in true being and in the whole shape of the wo