The largest country in terms of land area in Oceania is Australia. Covering approximately 7.7 million square kilometers, it is both a country and a continent, featuring diverse landscapes ranging from tropical rainforests to arid deserts. Australia's unique geographical features include the Great Barrier Reef, the world’s largest coral reef system, and the Outback, known for its rugged wilderness. This vast country is rich in biodiversity and cultural heritage, home to Indigenous peoples and a multicultural society.