Tol Eressëa

In J. R. R. Tolkien's fictional Middle-earth, Tol Eressëa is a large island, where the mallorn trees come from. Its name may be translated from Elvish as the Lonely Island, for it lay originally in the middle of the Belegaer, far from any other landmasses.

Ulmo pushed it back and forth across Belegaer twice to transport the Elves to Aman. After that, it came to rest forever just off the eastern shore of that continent in the Bay of Eldamar, and was inhabited by the Teleri of Aman, until they left for Alqualondë.

With the end of the First Age, many of the exiled Eldar of Middle-earth (and Teleri that had never left it) went to Aman, and lived in the island of Tol Eressëa. Its principal city was Avallónë.

In early versions of Tolkien's legendarium (see: The History of Middle-earth), the island was later visited by the Anglo-Saxon traveller Ælfwine (or in earlier versions Eriol, vaguely a European) which provided a framework for the tales that later became The Silmarillion.