I wrote the landscapes of the Southwest into this book as vividly as I could recall them. If you are unfamiliar with Martin's world, here are some photographs to bring it to life for you. You can find a photographic study for The Walls Have Eyes here.
Outside, Martin sees a tawny landscape with olive-green smudges for bushes or trees.

Martin worries because the semi-arid terrain doesn't give him many hiding places.
Except for Jimmy's rat, Martin has seen no animals, so the wildlife fascinates him.
He realizes that Chip's coloring, like the coloring of the wild animals, helps him blend in.
Martin meets Hertz in a gorge with walls that are striped orange and white. He notices that the rocks are crumbly and scratch easily: they are "soft" rocks. Much of the landscape in the Southwest shows sedimentary rocks, which have built up in layers and erode easily.
Storms in the Southwest can be very violent. This little cloud darkened rapidly and wound up hailing on me until the ground was white. The violence of the storm in the suburb adds to Martin's terror there.
When I saw this, I imagined Martin seeing BNBRX in the distance.
Webpage text copyright 2009 by Clare B. Dunkle. All photographs copyright 2009 by Joseph R. Dunkle.