Veeeery nice.
E.grandis do not occur naturally in the Illawarra....but there are planted trees the Botanic Gardens and at the University of Wollongong. (The Myall Lakes is about as far south as it occurs).
Instead we see
E.saligna....mostly as intergrades (with
E.botryoides)....but sometimes in pure stands (only on the upper escarpment)..... In this region, the 'most-closely resembling' species would be the pure E.saligna.