I plan to stay in Melbourne for 4 days: 1 day in the city, 1 day in The Great Ocean Road.I would like to ask how to make full use of the remaining two days? I am wondering if it is necessary to spend 2 days in The Great Ocean Road? I heard that Philip’s penguins are not worth seeing. I will fly back to Shanghai on the morning of the 5th day (7.40am). Is it too late to leave for the airport at 5 o ‘clock (I have not checked in my baggage)? Thank you very much!