The prairie is not monotonous if you're a) running with thunderstorms, b) running with 18-wheelers, or c) being chased by Indians (or zombies).
Trapped on the prairie with zombies in all directions would be a bad thing (one reason I've always questioned the trip to Las Vegas or the base in the middle of the desert in Resident Evil: Extinction).
Trapped on the prairie with zombies in all directions would be a bad thing (one reason I've always questioned the trip to Las Vegas or the base in the middle of the desert in Resident Evil: Extinction).