Hell or HFIL (Home For Infinite Losers) in the edited version, is a place in Other World where evil characters (and sometimes, in the case of Piccolo, Goku, and Pikkon, protagonists) go after they die. Hell is never actually

A part of Hell.

shown in the manga; however it is shown several times throughout the Dragon Ball Z and Dragon Ball GT anime series for example in the filler fight between Pikkon and Goku. Hell is also a scenario in the movie Dragon Ball Z: Fusion Reborn.