Brainfart
Don't take what I say seriously...
Colo river is awesome too...Jenolan is great, went there a few times as a kid. Reminds me a bit of the glowworm tunnel out in Lithgow, that's also a very cool place. Heard the great barrier Reef is bad now, not sure though. It was fine when I went there. Mount Kosciuszko I don't remember that much since I was tired but yeah, all mad places.