Aman
Aman, also called the Undying Lands, the Blessed Realm, and the Uttermost West, lay beyond the Great Sea at the far western edge of the World. This land was the home of the Valar and the destination of the Elves when they departed Middle-earth.[1]
Aman encompassed Valinor, the Enchanted Isles, and the havens and cities of Eldamar.[2]
The name "Undying" referred to the immortals who dwelt there, not to any gift of immortality granted to mortals who entered it.[3]
The term "Uttermost West" described the location of Aman as a continent, lying west across the ocean from Middle-earth. Though once part of Arda, it was difficult to reach even in the First Age, for the Valar filled the seas east of their realm with enchantments and shadows.
In the Second Age, the Valar forbade the Men of Númenor from sailing into the Uttermost West. When Ar-Pharazôn broke this ban and led his fleet to Aman, Ilúvatar removed it from the circles of the world, bringing about the Downfall of Númenor.
Thereafter Aman existed outside Arda, reachable only by Elves on the "Straight Road". Many departed Middle-earth for the Undying Lands during the Third Age, especially after the War of the Ring.[4]