Kakadu, the Aborigine heartland of Australia and the country's oldest national park, encompasses nearly 8,000 square miles (20,000 km2) where people have been living for more than 65,000 years. Rock painting began here nearly 20,000 years ago. Its rich heritage earned it a dual UNESCO World Heritage Site ranking as both cultural and natural treasure. Best way to get there is to fly into Darwin or Alice Springs where you can book a tour or an overland vehicle. It's open year round but with two distinct and very different seasons. The dry season from May to October is the most popular and when most visitor sites are open. It gets wet between November to April with flooding and storms, but landscapes are lush, crowds are thinner, prices are lower and iconic sites like Mourlangie, Ubirr and Yellow Water Wetlands remain open.