Screaming Desert
The Screaming Desert is the stretch of sand in every direction that surrounds the sinking city of Palimpsest. It is comprised (either fully or in part) of the dust from the destruction of previous apocalypses. No-one from Palimpsest ever ventures into the desert, which is inhabited by Ghouls.
The Screaming Desert is named after the sounds that can occasionally be heard from it at night, when the Ghouls get too close. The desert is a wasteland of rolling sand dunes and barren rock outcrops stretching in every direction as far as the people of Palimpsest have ever been able to explore, and is extremely hostile, populated entirely by mindless giant vermin, the occasional struggling plant life and, most significantly, hordes and hordes of Ghouls (and a few other related undead). The citizens of Palimpsest fear Ghouls above almost anything, and always cremate their dead as soon as possible.