Coober Pedy is actually quite an interesting place. It's first and foremost an opal mining town but makes bank from tourism these days as well. It's a convenient stopping point halfway between Adelaide and the central city of Alice Springs. Also, the town is known for underground living - a lot of residents and a number of hotels are underground, due to the fact that the AVERAGE daily maximum in January is 98.1F, with a historical max of 116.8. Even in the middle of winter in July, it has hit 86.2F.
I like this picture proudly displayed on its Wiki page:
That counts as "scenic" in the north of SA, a region characterised by hundreds of miles of absolutely nothing at all.
Edit: I've been there once btw, but as so young a child that I barely remember. I vaguely remember staying in an underground hotel. It's one of those places that is cool as a tourist I guess, but as a local there is no reason to ever go there.