Arkaroola is an International Dark Sky Sanctuary, and its observatories make good use of the isolation. With no big town nearby, the Milky Way can look almost solid on a clear moonless night.
Even if you are not usually an astronomy person, a guided viewing session helps explain what you are seeing and why this remote corner of South Australia is so good for it. Check schedules when you arrive; wind, cloud, and moonlight can change the night.