In the Second Age, a large island, Númenor, was created in the Great Sea, Belegaer, between Aman and Middle-earth it was destroyed in a cataclysm at the end of the Second Age, in which Arda was remade as a spherical world, and Aman was removed so that Men could not reach it. At the end of the First Age, the Western part of Middle-earth, Beleriand, was drowned in the War of Wrath. Arda was created as a flat world, incorporating a Western continent, Aman, which became the home of the godlike Valar, as well as Middle-earth. Tolkien's fictional world of Middle-earth, strictly a continent on the planet of Arda but widely taken to mean the physical world, and Eä, all of creation, as well as all of his writings about it.
The geography of Middle-earth encompasses the physical, political, and moral geography of J.