Vacation To Enjoy Natural Scenery

I heard that Australia is a great destination to enjoy natural. My friends went there before, she bring quite a lot of beautiful photo that taken at Sydney and Melbourne. I have forgot she was stayed at the Hotel in Sydney or Hotel in Melbourne for more than 5 days, and still want to extend more few days to enjoy the environment.

I wish to visit Australia too, perhaps bring my kids and parents to enjoy the vacation. I will book for the Hotel in Brisbane, and then go to Melbourne for apple and orange. Then, enjoy Sydney nightlife for the last few days. Well, must bring family together for vacation. Else, I will not enjoy the vacation as well.