At Sydney's New Year's Eve celebration, which famous harbor landmark is central to the midnight fireworks display?

Sydney Harbour Bridge is the famous landmark central to Sydney’s New Year’s Eve midnight fireworks display.

Sydney’s celebration uses the harbor as a large outdoor stage, with fireworks launched from the bridge, barges, and nearby structures. The bridge’s steel arch and the Sydney Opera House provide the event’s most recognizable backdrop, making the display easy to identify in photographs and broadcasts.

Sydney’s major fireworks tradition developed into a globally watched event during the late twentieth century. The city stages an earlier family fireworks show as well as the midnight display, helping accommodate children and visitors who do not stay up until midnight.

The Opera House is also part of the scenery, but it is not the landmark named in this answer. Sydney’s celebration is often described as one of the first major international New Year events because Australia reaches midnight before Europe and the Americas.