Île Macquarie

Located in the Southern Ocean between Australia and Antarctica, this subantarctic island rises from the sea as a rare exposed section of oceanic crust, offering exceptional geological significance. The site represents a unique natural laboratory where the Earth's mantle material is directly accessible, providing critical insights into oceanic geology and the planet's internal structure. The island's isolation has fostered distinctive ecosystems characterized by endemic flora and specialized fauna, including large populations of seabirds and marine mammals adapted to extreme subantarctic conditions. Visually, the landscape is marked by dramatic coastal cliffs, glaciated peaks, and exposed rock formations that reflect both its geological origins and ongoing environmental processes. The site's designation as a natural heritage property recognizes its outstanding geological value and the importance of preserving its pristine natural environment for scientific research and understanding of Earth systems.