Hueco Mundo can be briefly summarized as "sand" and "Las Noches." The latter is an area exclusive to the cream of the crop: the Arrancars so other dwellers of Hueco Mundo have to make do with what is left.

"The landscape of Hueco Mundo is a seemingly never-ending white desert, with dunes like those of the Sahara. The desert is littered with what appear to be boulders and shriveled trees, but these are actually a form of quartz. In Hueco Mundo, the moon is on the opposite lunar phase of that in the Human World. The vast desert also seems to lack any bodies of water. Like in Soul Society, the atmosphere is filled with Reiryoku in the form of Reishi, but it is more concentrated, thus allowing smaller Hollows to gain nourishment despite the lack of Human souls."