In Andy Weir’s “The Martian,” stranded astronaut Mark Watney drives from the Ares 3 landing site in Acidalia Planitia towards the Ares 4 landing site in Schiaparelli Crater via Mawrth Vallis. This image covers the entrance to Mawrth Vallis. (Have a look at the scene in 3D).
As you can tell, driving over this terrain will be much more difficult than it was depicted in the novel or the movie. [More at link]