If you want to travel to Sydney and Italy, what are the strategies?

The landmark buildings include Sydney Opera House, Sydney Harbour Bridge, Sydney Tower, St Mary's Cathedral and University of Sydney. Practice has proved that the above scenic spots 1 day and a half can be completed. Other tourist attractions include Zoo, Sea World (taking photos), Wax Museum (taking photos), Darling Harbour (gathering place for fellow travelers), Rock Area (old street), Blue Mountain, Chinatown and seafood market (eating goods). 1 day and a half can be completed.