Australia boasts diverse national parks showcasing ancient geology, rich wildlife, and Indigenous heritage. Kakadu National Park, a UNESCO World Heritage Site, is the largest, covering over 20,000 sq km of wetlands and escarpments. It features abundant birdlife, crocodiles, seasonal waterfalls, and ancient rock art dating back over 20,000 years, significant to Aboriginal culture. The dry season from May to October is the ideal visiting period.