§ Of the Beginning of Days The Silmarillion

Thus ended the Spring of Arda. The dwelling of the Valar upon Almaren was utterly destroyed, and they had no abiding place upon the face of the Earth. Therefore they departed from Middle-earth and went to the Land of Aman, the westernmost of all lands upon the borders of the world; for its west shores looked upon the Outer Sea, that is called by the Elves Ekkaia, encircling the Kingdom of Arda. How wide is that sea none know but the Valar; and beyond it are the Walls of the Night. But the east shores of Aman were the uttermost end of Belegaer, the Great Sea at the West; and since Melkor was returned to Middle-earth and they could not yet overcome him, the Valar fortified their dwelling, and upon the shores of the sea they raised the Pelóri, the Mountains of Aman, highest upon Earth. And above all the mountains of the Pelóri was that height upon whose summit Manwë set his throne. Taniquetil the Elves name that holy mountain, and Oiolossë Everlasting Whiteness, and Elerrína Crowned with Stars, and many names beside; but the Sindar spoke of it in their later tongue as Amon Uilos. From their halls upon Taniquetil Manwë and Varda could look out across the Earth even into the furthest East.