Nekromanteio, the most famous oracle of the dead of the ancient Greek world lies near the northwest shores of the Acherousian Lake where Acheron and Kokytos, the rivers of Hades, meet. Ancient literary sources describe the Acherousian Lake as the place where the dead began their descent to Hades. In ancient times the nekromanteion attracted people wishing to meet the souls of the dead, as these were able to foresee the future after having left their body.