Númenor

Númenor, also called Elenna-nórë or Westernesse, is a fictional place in J. R. R. Tolkien's writings. It was the kingdom occupying a large island to the west of Middle-earth, the main setting of Tolkien's writings, and was the greatest civilization of Men. However, after centuries of prosperity, many of its inhabitants ceased to worship the One God, Eru Ilúvatar, and they rebelled against the Valar. They invaded Valinor in an erroneous search for immortality, resulting in the destruction of the island and the death of most of its people. Tolkien intended Númenor to allude to the legendary Atlantis.