This is a map of Taronga Zoo circa 1999.
It shows the construction of the 'Ceatures Of The Wollemi' exhibit (middle right of map) which was opened in 2000.
You can also see the old aviaries in the bottom right of the map where 'Backyard To Bush' currently stands, and the farm where 'Wild Asia' now is.
There are also a few other changes including movement of animals and some new enclosures.
Sorry for the poor quality of the image.