Tartarus

Tartarus, in Greek mythology, the lowest region of the underworld. According to Hesiod and Virgil, Tartarus is as far below Hades as the Earth is below the heavens and is closed in by iron gates. In some accounts Zeus, the father of the gods, after leading the gods to victory over the Titans, banished his father, Cronus, and the other Titans to Tartarus. The name Tartarus was later employed sometimes as a synonym for Hades, or the underworld in general, but more frequently for the place of damnation where the wicked were punished after death. Such legendary sinners as Ixion, king of the Lapiths, Sisyphus, king of Corinth, and Tantalus, a mortal son of Zeus, were condemned to dwell in Tartarus.