 The urban environs of the city of Canberra straddle the Ginninderra plain, Molonglo plain, the Limestone plain, and the Tuggeranong plain (Isabella's Plain).The Molonglo River which flows across the Molonglo plain has been dammed to form the national capital's iconic feature Lake Burley Griffin.The Molonglo then flows into the Murrumbidgee north-west of Canberra, which in turn flows north-west toward the New South Wales town of Yass.