This suspension bridge can be reached by a short walk through the Tarra Bulga National Park. It is a beautiful area, and home to many of the elusive lyrebird. When I was there, I saw three lyrebirds. One of them was really going for it with all the mimicking mating calls. It mimicked a crying baby and a zoom lens on a camera, amongst other birdsong.
The Tarra Bulga National Park is about 2.5 hours drive East of Melbourne. There are plenty of accommodation options in the area, and it's not too far from Wilson's Promontory.