The Desert of Grenh is a poisoned wasteland in All-World to the west of Garlan. It is mentioned in "The Eyes of the Dragon".
Description
The Desert of Grenh consists of "Dragon Sand", the potent poison used by Flagg in to murder King Roland of Delain.
It is said that the poisonous fumes from the Dragon Sand make it impossible to survive approaching the desert when the wind is blowing eastwards.