Australia is one of the world’s oldest land masses. It is the earth’s biggest inhabited island and the sixth largest country in the world. It is also one of the driest, with just 6 per cent of its land considered suitable for agriculture. Distances are vast and visitors are often surprised at the size of the country and how long it takes to travel from city to city. Australia stretches about 4000 kilometres from east to west and 3700 kilometres from north to south. It takes about five hours to fly from Sydney to Perth. In total area, Australia is about the same size as the United States (not including Alaska), more than double the size of India and 32 times the size of the United Kingdom.