Mount Warning Caldera is a large volcanic structure located in New South Wales, Australia. It was formed around 23 million years ago when a massive volcano erupted, leaving behind a circular depression known as a caldera. The area is now part of the Wollumbin National Park and is recognized for its rich biodiversity and unique ecosystems. The caldera is named after Mount Warning, the peak that rises from its center. This peak is significant to the local Bundjalung people, who regard it as a sacred site. Today, the region attracts hikers and nature enthusiasts, offering stunning views and a glimpse into its geological history.