That’s the War Memorial (also a fantastic museum, by the way) at the bottom of the picture. Then the ANZAC Parade. On the day we left (which was not the day of this photo), ANZAC Parade was lined with alternating Australian and US flags, as Barack Obama was arriving for his visit that day.
Across Lake Burley Griffin the white building is the Old Parliament House (which contains an outstanding Museum of Democracy). Then well beyond that, under the massive flag pole, is the current parliament building.
The view is from the Mt. Ainslie lookout.
More (in addition to the specific links above).