Adelaide is the capital and most populous city of the Australian state of South Australia, and is the fifth-largest city in Australia. It is known as "The City of Churches". Adelaide stretches 20 km (12 mi) from the coast to the foothills, and 90 km (56 mi) from Gawler at its northern extent to Sellicks Beach in the south. As South Australia's seat of government and commercial centre, Adelaide is the site of many governmental and financial institutions. Most of these are concentrated in the city centre along the cultural boulevard of North Terrace, King William Street and in various districts of the metropolitan area. Today, it is noted for its many festivals and sporting events, its food and wine, its long beachfronts, its large defence and manufacturing sectors. It ranks highly in terms of liveability, being listed in the Top 10 of The Economist Intelligence Unit's World's Most Liveable Cities!

Cairns is a regional city in Far North Queensland, Australia. The city was named after William Wellington Cairns. It was formed to serve miners heading for the Hodgkinson River goldfield, but experienced a decline when an easier route was discovered from Port Douglas. It later developed into a railhead and major port for exporting sugar cane, gold and other metals, minerals and agricultural products from surrounding coastal areas and the Atherton Tableland region.  Cairns is a popular travel destination for tourists because of its tropical climate and access to the Great Barrier Reef, one of the seven natural wonders of the world.