The Australian Capital Territory, often abbreviated ACT, is the capital territory of the Commonwealth of Australia and is the smallest self-governing internal territory. It is enclaved within New South Wales and contains Canberra, which is regularly referred to as Australia's 'Bush Capital'.
The ACT is bounded by the Goulburn-Cooma railway line in the east, the watershed of Naas Creek in the south, the watershed of the Cotter River in the west, and the watershed of the Molonglo River in the north-east. The ACT also has a small strip of territory around the southern end of the Beecroft Peninsula, which is the southern headland of Jervis Bay.
Apart from the city of Canberra, the Australian Capital Territory also contains agricultural land (sheep, dairy cattle, vineyards and small amounts of crops) and a large area of national park (Namadgi National Park), much of it mountainous and forested. Small townships and communities located within the ACT include Williamsdale, Naas, Uriarra, Tharwa and Hall.
Tidbinbilla is a locality to the south-west of Canberra that features the Tidbinbilla Nature Reserve and the Canberra Deep Space Communication Complex, operated by the United States' National Aeronautics and Space Administration (NASA) as part of its Deep Space Network.