In Greek mythology, the Greek underworld, or Hades, is a distinct realm where an individual goes after death. The earliest idea of afterlife in Greek myth is that, at the moment of death, an individual's essence (psyche) is separated from the corpse and transported to the underworld. In early mythology the dead were indiscriminately grouped together and led a shadowy post-existence; however, in later mythology elements of post-mortem judgment began to emerge with good and bad people being separated.

In Greek mythology, Charon or Kharon is a psychopomp, the ferryman of the Greek underworld. He carries the souls of those who have been given funeral rites across the rivers Acheron and Styx, which separate the worlds of the living and the dead. Archaeology confirms that, in some burials, low-value coins known generically as Charon's obols were placed in, on, or near the mouth of the deceased, or next to the cremation urn containing their ashes. This has been taken to confirm that at least some aspects of Charon's mytheme are reflected in some Greek and Roman funeral practices, or else the coins function as a viaticum for the soul's journey. In Virgil's epic poem, Aeneid, the dead who could not pay the fee, and those who had received no funeral rites, had to wander the near shores of the Styx for one hundred years before they were allowed to cross the river. Charon also ferried the living mortals Heracles and Aeneas to the underworld and back again.