I have seen 2 very good Australian exhibits during the last 2 months, both are located in small Belgium.
The first one is Planckendael, which will be upgraded by Tasmanian devils latest 2017, already including lots of Australian Fauna Highlights like Cassowary, Wombat, Echidna, Koala, black Wallaby, dusky Wallaby, tawny frogmouth, etc.
Second one is Pairi Daiza with a nice walk-through enclosure for red giant kangaroos and spectacled pelicans, a walk-through aviary with parakeets, herons, small kangaroos, cockatoos, pigeons, Australian curlew, etc. and lots of typical Aussies like Emu, Black Wallby, Wombat, Koala, Potoroo, etc.
The most fascinating for me was something that hasn´t anything to do with the animals: A gian tree fern forest...