Fox
The highest point of the drive down, with a superb 3600 view, which can be seen here (apologies for the audio noise, as it was very windy). As I drove as close I could, a desert fox ran up the slope, looked at me, then disappeared before I grab a photo. I found out where he lived though. You are looking for a 750ml cliptop box.
4WD essential, serious off-road country, and all normal desert driving precautions should be taken.
The secondary challenge is how close can you get to the cache in your car.