Final answer:
Australia's largest natural formation is the Great Barrier Reef. Other notable features include Uluru and Mount Augustus, massive rock formations holding cultural significance for Australia's aboriginal populations.
Step-by-step explanation:
The largest natural formation in Australia is the Great Barrier Reef. Extending for around 1,600 miles off the northeastern coast of Australia, this coral reef is the largest barrier reef globally. It houses a large variety of sea creatures and fishes, making it a significant tourist attraction and a vital source of income for the Australian economy. Moreover, this remarkable reef has been recognized as a United Nations World Heritage Site.
Other significant natural formations in Australia include Uluru, or Ayers Rock, and Mount Augustus. These massive rock formations, nestled in the heart of the Australian outback, hold significant cultural value for the aboriginal populations in Australia and are also major tourist attractions.
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