I mean, something like:
- Gas Station - inspired by the American movies which contain scenes located in deserts with gas stations in the middle of nowhere

- Oil Pumps - from TMUF's Desert pumps of course, but make them move this time
- Water - for making some nice looking rivers or small lakes
- Cacti - i think that this one's necessary for an environment like this
- Waterfalls - not really sure about this

- Hoover Dam - this would look cool