Beginning as an outpost established with the Australian Overland Telegraph Line on the north–south transport route between Darwin and Adelaide, Katherine has grown with the development of transport and local industries including mining – particularly gold mining; a strategic military function with RAAF Base Tindal; also as a tourism gateway to the attractions of nearby Nitmiluk National Park, particularly Nitmiluk (Katherine) Gorge and its many ancient rock paintings. The region floods heavily during the wet season.