What is austrialia most famous naturllandmark?

Australia's most famous natural landmark is the Great Barrier Reef, the world's largest coral reef system. Stretching over 2,300 kilometers along the Queensland coast, it is renowned for its stunning biodiversity and vibrant marine life. The reef is a UNESCO World Heritage site and attracts millions of visitors each year for snorkeling, diving, and eco-tourism. Its beauty and ecological significance make it an iconic symbol of Australia's natural heritage.