The Northern Territory is an Australian internal territory in the central and central-northern regions of Australia. The Northern Territory shares its borders with Western Australia to the west, South Australia to the south, and Queensland to the east. To the north, the Northern Territory looks out to the Timor Sea, the Arafura Sea and the Gulf of Carpentaria, includi…The Northern Territory is an Australian internal territory in the central and central-northern regions of Australia. The Northern Territory shares its borders with Western Australia to the west, South Australia to the south, and Queensland to the east. To the north, the Northern Territory looks out to the Timor Sea, the Arafura Sea and the Gulf of Carpentaria, including Western New Guinea and various other islands of the Indonesian archipelago.