Cairns is close to the Great Barrier Reef and therewith a center for diving and excursions.
The Great Barrier Reef is the largest coral reef in the world. It is approx. 2300 km long, the size of Germany or New Mexico and can be seen from outer space. A true Wonder of the Natural World.
The Daintree Rainforest is one of the last original rainforests in Australia and a UNESCO protected area.
Sydney is one of the great cities in the world and this mainly thanks to the beautiful natural harbor. It is also the most populated city in Australia with a lot of immigrants who brought their own culture to down-under. Tourists will enjoy the walk on the Sydney bridge, the opera house and some beaches. Nearby is also the Blue Mountains...
Airlie Beach is a beach resort with campsites and lots of pretty birds and flying foxes. It is also the starting point for day trips to the Whitsunday Islands and beaches.
Uluru (Ayers Rock) is a huge monolyte. Only 10% is above ground, the rest is below. The Rock is sacred for the original inhabitants of Australia - the Aboriginals. Since October 2019 it is no longer possible to climb to the top.
Brisbane is one of the 5 big Australian cities and the capital of Queensland. Lots of businesses, restaurants, bars and close to the Gold Coast. Great beaches, excellent surfing, mostly sunny year-round. Have not seen a koala or kanguru nearby? Visit Lonepine sanctuary... Note that Brisbane has 2 airports for easy access.
Coober Pedy is a "mining" town, sometimes called "the opal capital of the world". You may stay a night at a hotel here under ground (where it is cooler).
Darwin is the place to be if you like nature and warmth. "Kakadu National Park" and crocodiles just around the corner. The Ghan starts here... This is the smallest provincial capital of Australia and quite close to Indonesia.