Where do bad folks go when they die?
Don't go to heaven where the angels fly.
Go to a Lake of Fire and fry.

- Meat Puppets, Lake of Fire (Covered by Nirvana).

In addition to the more informative notes here and at Gehennom, a plane in the Dungeons and Dragons Planescape Multiverse. Like much of that setting's geography, it draws on Jewish and Christian imagery. Moloch was said to rule in Gehenna, due to his association with the burnt sacrifice of children. Gehenna is the Outer Plane of Lawful Neutral Evil, and takes the form of four immense double-ended volcanoes hanging in space. Force of will, cruelty and malice are supreme in this land. Pain is the means of enforcing the will of the strong. Baator and the Grey Waste lie on either hand.