The Great Barrier Reef stretches along Australia’s northeast coast, forming the largest coral reef system on Earth and one of the planet’s most complex living ecosystems.
Kilauea is the world's largest active volcanic mass, located southeastern Hawaii Island. The central feature of Hawaii Volcanoes National Park is an elongated dome built of lava eruptions from a central crater and from lines of craters extending along east and southwest riffs or fissures.
Caprivi, now officially known as the Zambezi Region of Namibia, is a narrow, water-rich area in the country's far northeast, extending between Angola, Zambia, Botswana, and Zimbabwe. Unlike much of Namibia's dry interior, Caprivi contains perennial rivers, floodplains, wetlands, woodland, and riverine forests.