Ha ha.
there use to be a great flying fox set up running from the rock below the car park down behind the big triangle rock opposite the main jump. (you can jump that rock too but have some one check the depth before you do, i've hit the bottom in a couple of places jumping there so take care, 'specialy when diving.)
Oh, and the canyon down the creek is work a look too, but take a wet suit and some short ropes.
BTW, that's the lower Dargan creek dam. there are jumps in the upper dam that are higher, though a bit more dodgy. There are also some nice jumps over at the water works dam.