Helicopter Flight over the Falls of Kakadu. I had spoken before of wildlife and Kakadu Aboriginal paintings, but the most amazing aspect of this PN are cataracts that are in the upper part of Arnhem Land. This is the Twin Falls and Jim Jim Falls, an amazing 200m waterfall which is one of the biggest in the continent. The dry and wet periods determine the Top End of Australia. There are many zones of the country that remain cut off by land during rains and this part of Kakadu is one of them. We visited the zone during "the wet" time, and the only access was by helicopter. Flybys can be rented at Jabiru Airport, which serves the Kakadu park.