Adelaide is the capital of South Australia and has a metropolitan area population of approximately 1.2m.
Unfortunately for Adelaide it has been held back from building very tall buildings due to a combination of height restrictions imposed by the City Council and the bodies in control of airspace requirements.
At present the tallest building is the Westpac tower at 135m.
Here is a couple of buildings on the drawing board
Spire Living - 107m - 37lvl
Hanging Gardens Hotel - 81m - 22lvl