Australia is the world's only island continent, with its population concentrated in vibrant cities lining the coastal edges. Sydney, Melbourne, Brisbane, and Perth rank among the nation's most popular tourist destinations. Sydney Harbour and its iconic Opera House draw millions of visitors, while Melbourne is renowned for its narrow laneways, street art, and coffee culture. Beyond the metropolitan areas, Australia's landscapes reveal astonishing diversity. Travelers can journey north to the world-class diving destination of the Great Barrier Reef or venture deep into the Red Centre to witness the colossal sandstone monolith of Uluru. The Great Ocean Road offers spectacular coastal views of limestone sea stacks, while the island state of Tasmania features rugged mountains and cool temperate rainforests. You can also experience the tropical heat of Darwin one moment and the winter snow of the Australian Alps the next.