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 mythology. One was in Aornum. Tantalus, for instance, would not be sent to Tartarus. Only condemned monsters and titans are sent to Tartarus. In Roman mythology, Tartarus is the place where sinners are sent. Virgil describes it in the "Aeneid" as a gigantic place, surrounded by the flaming river Phlegethon and triple walls to prevent sinners from escaping from it. It is guarded by a hydra with fifty black gaping jaws, which sits at a screeching gate protected by columns of solid adamantine, a substance akin to diamond – so hard that nothing will cut through it. Inside, there is