10 most difficult Aus­tralia riddles

More than 40% of Australia's land is classified as desert, but almost all of it is located inland. The Great Sandy Desert is the only one to extend to the coast, forming the long sweep of the Eighty Miles Beach (which is actually 140 miles long).

Janszoon reached the Gulf of Carpentaira (north of Australia) and made a landfall in 1606. However, he found the land swampy and the people inhospitable. He called the land he had discovered “Nieu Zeland” after the Dutch province of Zeeland, but the name was not adopted and was later used by Abel Tasman for New Zealand.

The Gibson Desert was named by explorer Ernest Giles after a member of his party, who became lost and presumably died in the desert. There is almost nothing known about Alfred Gibson apart from his disappearance.

Arafura sea is warm and shallow. During the last ice age, the sea was dry and formed a bridge for humans to reach Australia.

The strait was named after George Bass, after he and Matthew Flinders passed through it while circumnavigating Tasmania in 1798–99. It is one of the world's most dangerous straits due to its wild storm waves, strong currents and shallow waters.

Byblis is a small genus of carnivorous plants, sometimes termed the rainbow plants for the attractive appearance of their mucilage-covered leaves in bright sunshine. Native to western Australia. The first species in the genus was described by the English botanist Richard Anthony Salisbury in 1808.

Bondi Beach is a popular beach and the name of the surrounding suburb in Sydney, New South Wales, Australia and is one of the most visited tourist sites in Australia. "Bondi" is an Aboriginal word meaning water breaking over rocks or noise of water breaking over rocks.

The Morning Glory cloud is a roll cloud, or arcus cloud, that can be up to 1,000 km long, 1 to 2 km high and often only 100 to 200 metres above the ground. The southern part of the Gulf of Carpentaria in Northern Australia is the only known location where it can be predicted and observed on a more or less regular basis due to the configuration of land and sea in the area.

Australia is a federation of six states, together with ten federal territories. The Australian mainland consists of five of the six federated states and three of the federal territories (the "internal" territories). The state of Tasmania is an island about 200 kilometres (120 mi) south of the mainland. The remaining seven territories are classified for some purposes as "external" territories.

Sydney is the state capital of New South Wales and the most populous city in Australia and Oceania. In addition to hosting events such as the 2000 Summer Olympics, Sydney is amongst the top fifteen most-visited cities in the world, with millions of tourists coming each year to see the city's landmarks.