The "Gnoll Wastes" is the name for the arid region to the East of Fenghast, named so because it is thoroughly overrun by gnolls. The stark difference in climate between the wastes and the environs just the the West is said to be the effect of the long lasting fallout of a catastrophic evocation cast long ago.
Parkinsonia trees, cacti, and creosote bush make up the flora of the wastes. Though the level landscape stretches on farther than anyone knows, there is always a butte or mesa within a few miles. Ziggurats and dwelling complexes made from remarkably preserved adobe are built on top of or into the sides of many of these rocky outcrops. The gnolls exhibit some reverence for these buildings, but do not have the industrious nature necessary to build them. Who did build these landmarks is unknown.