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.
Barossa Valley, 1 hour North of Adelaide, is one of the main wine areas of Australia and probably in the world. It is fun to try some samples at the different vineyards without getting drunk. If lucky you can even go on a balloon ride and enjoy the views.
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).
Exmouth is located between Perth and Darwin on Australia's West Coast. The city has an airport that can be used to reach the famous Ningaloo reef.
Ningaloo is one of the most pristine reefs in the world known for its magnificent underwater wildlife that includes not only corals, but also whale sharks and manta rays.
Fraser island, in QLD, is considered to be the largest sand island in the world at 1,840 km2. It has rainforests, eucalyptus woodland, mangrove forests, swamps, sand dunes and coastal heaths.
Hobart is capital of the province Tasmania with the "best air" in Australia and relaxing it is. Discover the harbor and Salamanca markets. A real highlight in Hobart is nearby Mount Wellington with some of the best views, anywhere.
Hunter Valley is the oldest wine region in Australia, not far from Sydney.
Kalbarri is a large national park in Western Australia. The most popular activities are sightseeing (Nature's window, Sky bridges), boating, fishing, picnicking and bushwalking.