sydneySydney is the capital city of the state of New South Wales and the most populous city in Australia and Oceania.Located on Australia's east coast, the metropolis surrounds Sydney Harbour and extends about 80 km (50 mi) from the PacificPlan your Sydney trip with , your go-to travel guide for attractions, experiences, weather, and more. Book on and explore the best of Sydney, from iconic landmarks to scenic beaches and beyond.