Freezing Tundra of Hell
From Dragon Ball Encyclopedia, the ''Dragon Ball'' wiki
The Freezing Tundra of Hell is the fourth and last stage of Enma's torture system.
Dragon Ball GT
The Freezing Tundra of Hell was located in Hell. Victims were placed in the middle of this frozen wasteland to freeze. Along with that was a huge machine that Enma used to encase a victim in soul-laced ice crystals, which got stronger if struggled against. If the victim was a resident of the Next World, their frozen body could be shattered (but later repaired). If the victim was of the living world, the ice would melt due to the victim's heat energy and they would break free.