According to Sam Kieth this is in Australia. It is not the one we learn in textbooks and in school, but the "Real" Outback. Where weird and exciting creatures roam.
In the series the Maxx, the Outback would be the place where "Maxx" would protect his Jungle Queen. This version of the Outback would first be found in Darker Image #1.
Once someone goes to the Outback, their appearance changes. Julie Winter's of the series The Maxx is The Queen of The Outback.
The word "CHUNG!" ties into The Maxx being transported to the Outback.
The Isz and other life on the Outback
The Isz are the most famous of all the creatures of the Outback. There are two kinds of Isz, the white and the black. The white are the native species to the Outback.
They were friendly creatures in their earlier appearances in The Critters. It is not been officially established if those Isz were related to these Isz.
The Isz have become a pest to The Maxx.
The Maxx on MTV's Oddities
The Outback is present in the animated adaptation of The Maxx as well.