Looks like they did some bungi jumping!
"Bloukrans Bridge was the next stop on our journey. This is the home of the world’s highest commercial bungee (216 m)! When we arrived, we discovered that the Amazing Race Australia was being filmed there, so we had to wait until all of the teams had shown up and finished."
This is in West Cape, between Cape Town and Port Elizabeth. Not sure of the date of this need to confirm.