Sydney, Australia (c)Giovanni GagliardiSYDNEY, AUSTRALIA - AUGUST 20, 2018: Aerial view of Sydney Opera House on a beautiful sunny afternoonSwimmer in a pool along the ocean with waves crushingSYDNEY - OCTOBER 2015: City buildings on a beautiful sunny day. The city attracts 20 million people annually.(c)Giovanni GagliardiSYDNEY, AUSTRALIA - AUGUST 18, 2018: Sydney Luna Park is a major attraction in the harbourside suburb of Milsons Point, view at nightSydney, Australia. Panoramic aerial view of city skyline and famous harbor area.Side view of Sydney Harbour Bridge at dusk from Walsh Bay