Australian Capital Territory formerly, "The Territory for the Seat of Government" and, later, the "Federal Capital Territory" is a territory in the south east of Australia, enclave within New South Wales. It is the smallest self-governing internal territory in Australia. The only city and by far the most populous community is Canberra, the capital city of Australia.
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 northern headland of Jervis Bay.