Acheron Cocytus and Phlegethon both flowed. The Roman poet Virgil called it the principal river of Tartarus, from which the Styx and Cocytus both sprang. The newly dead would be ferried across the Acheron by Charon in order to enter the Underworld. The Suda describes the river as "a place of healing, not a place of punishment, cleansing and purging the sins of humans". According to later traditions, Acheron had been a son of Helios and either Gaia or Demeter, who had been turned into the Underworld river bearing his name after he refreshed the Titans with drink during their contest
Tartarus a castle with wide walls, and a tall iron turret. Tisiphone, one of the Erinyes who represents revenge, stands guard sleepless at the top of this turret lashing a whip. There is a pit inside which is said to extend down into the earth twice as far as the distance from the lands of the living to Olympus. At the bottom of this pit lie the Titans, the twin sons of Aloeus, and many other sinners. Still more sinners are contained inside Tartarus, with punishments similar to those of Greek myth. Tartarus occurs in the Septuagint of Job, but otherwise