Level plains of smooth sand—a little rosier than buff, a little paler than salmon—are interrupted only by occasional peaks of rock—black, stark, and shapeless. Rainless storms dance tirelessly over the hot, crisp surface of the ground. The fine sand, driven by the wind, gathers into deep drifts, and silts among the dark rocks of the hills exactly as snow hangs about an Alpine summit; only it is a fiery snow, such as might fall in hell. The earth burns with the quenchless thirst of ages, and in the steel-blue sky scarcely a cloud obstructs the unrelenting triumph of the sun.

Winston Churchill describing northern Sudan in The River War.