Canberra can be seen in the distance, you might be able to spot Black Mountain Tower just below the horizon on the left hand side.
For an idea of scale look for the guy sitting on the top of the rocks on the right hand side...
When they tried Roombas for the yearly vacuuming of these rocks they all fell off the edge and caused a lot of hard work retrieving them, after that they changed the name of the place and went back to vacuuming it with teams of people.