The Martian City
I was always intrigued not only by the slightly electronic/weird music used in the city scenes but by the arcitecture of the city itself. Mostly formed of geometric shapes (spheres, cones, blocks, etc).
I always wondered whether this was a huge stage set or an actual location. I have to assume that it's a huge set - as the sphere's look somewhat styrofoam-like (you know those rocks you find in old Star Trek episodes).