The coastline in the
Top End includes three of Australia's largest islands,
Groote Eylandt,
Bathurst Island and the largest,
Melville Island. The highest point in the Territory is
Mount Zeil at 1,531 metres (5021.68 ft) and is situated in the
MacDonnell Ranges. In the northern part of the territory lies
Kakadu National Park, that features wetlands and native wildlife. To the north of that is the
Arafura Sea, and to the east
Arnhem Land, whose regional centre is
Maningrida on the
Liverpool River delta. Much of the Territory is relatively flat, but has some disconnected ranges, including the sandstone plateau of western
Arnhem Land. Long mountain ranges are more a feature of Central Australia, these include the
MacDonnell Ranges, the
Petermann Ranges, and
Harts Range. The
Northern Territory also has the natural rock formations of
Uluru and
Kata Tjuta, which are sacred to the local
Aboriginal people. The northern portion of the territory is principally
tropical savannas, composed of several distinct
ecoregions –
Arnhem Land tropical savanna,
Carpentaria tropical savanna,
Kimberley tropical savanna,
Victoria Plains tropical savanna, and
Mitchell Grass Downs. The southern portion of the territory is covered in
deserts and xeric shrublands, including the
Great Sandy-Tanami desert,
Simpson Desert, and
Central Ranges xeric scrub. Each ecoregion consists of one or more
IBRA regions. The
Northern Territory has the two largest deserts in Australia, the
Tanami Desert (184,500 km)2 in the northern part of the Territory, and the
Simpson Desert (176,500 km)2 of Central Australia. There is a series of river systems in the Northern Territory that include
Alligator Rivers,
Daly River (with its major tributary the
Katherine River),
Finke River,
McArthur River,
Roper River,
Todd River and
Victoria River. The
Victoria River is the longest river in the
Northern Territory and flows for . The
Hay River is east of Alice Springs, with the Marshall River, Arthur Creek, Camel Creek and Bore Creek as tributaries. ==References==