- Hades redirects here. For the god of the underworld, see: Hades (God).
The Underworld, also known as Hades after its god, was the place where everyone descended after dying. It was a place where the dead gathered and lived in the darkness.
Jason and Hercules were forced to descend into the Underworld when looking for Pandora's Box. They crossed through the darkness all the way to Tartarus where Campe's lair was situated. They needed the life source of Pythagoras to reawaken from the dead after taking the box. (Pandora's Box)