Dunedin is the second-largest city in the South Island of New Zealand, and the principal city of the Otago Region. It is considered to be one of the four main urban centres of New Zealand for historic, cultural, and geographic reasons. Dunedin was the largest city by territorial land area until superseded by Auckland on the creation of the Auckland Council in November 2010. Dunedin was the largest city in New Zealand by population until about 1900. The Dunedin urban area lies on the central-eastern coast of Otago, surrounding the head of Otago Harbour. The harbour and hills around Dunedin are the remnants of an extinct volcano. The city suburbs extend out into the surrounding valleys and hills, onto the isthmus of the Otago Peninsula, and along the shores of the Otago Harbour and the Pacific Ocean.

Sydney is the largest and most populous city in Australia and the state capital of New South Wales. The city is located on Australia's south-east coast of the Tasman Sea. It is also the oldest and most cosmopolitan city in Australia with an enviable reputation as one of the world's most beautiful and liveable cities. Brimming with history, nature, culture, art, fashion, cuisine, design, Sydney's set next to miles of ocean coastline and sandy surf beaches. Long-term immigration has led to the cities reputation as one of the most culturally and ethnically diverse cities in Australia and the world. The city is also home to the Sydney Opera House and the Sydney Harbour Bridge, two of the most iconic structures on this planet.