The Bunda Cliffs are pretty special! They span about 800 kilometers starting about 50 kilometers into the SA border coming in from WA. It's almost as though they don't want people to go to see them as there are no signs until you get to the "Head of the Bight" (just after the Nullarbor Road House).
You will see in the shots taken from my drone, that there is a signficant under cut along the cliffs. Don't follow the crowd and park too close to the edge.