Sydney Harbour hosts Australia's famous New Year's Eve fireworks beneath the Harbour Bridge.
The annual celebration centers on Sydney Harbour, with fireworks staged around landmarks including the Sydney Harbour Bridge and the Sydney Opera House. Because Sydney lies near the International Date Line relative to many major world cities, its midnight display is among the first large New Year's spectacles watched internationally, although several places enter the new year earlier.
The event includes a midnight fireworks show as well as an earlier family-friendly display. Boats, foreshore parks, and specially controlled viewing areas provide different perspectives, while television and online broadcasts extend its reach far beyond the harbor.
The Harbour Bridge and Opera House are sometimes treated as interchangeable answers, but the question asks for the harbor hosting the celebration. The bridge is a landmark used in the display; Sydney Harbour is the geographic setting. Fireworks safety, maritime closures, and crowd controls are central parts of the modern event.