For those interested I just published a short video on YouTube of the "Organ Pipes" at National Park of same name. Not a long walk by any means (just a fairly short walk from car park) but worth seeing, in my opinion. http://youtu.be/zu4u9L8TzWY
Kinda remember going there. If I recall correctly the water isn't deep enough to swim in which would be the only way to make it worthwhile to visit if you ask me.