Apart from the scenery and tranquility of the walk, the highlight was seeing not one but three Superb Lyrebirds at different points of the track! As well, they stayed within a few metres of us, scratching around in the thick undergrowth for several minutes before drifting away. Previous sightings elsewhere have usually been fleeting glimpses of a running bird or a raised tail a long way off.
Getting a decent photo was hard due to the poor light, and the difficulty of getting focus on a moving target in thick vegetation. Resorting to flash helped and didn't seem to bother the birds.
This DEPI brochure has more information or Google Toorongo Falls Reserve.