The sandstone here was cut into a benchlike-shape for the governor's wife who loved views of the harbour - now you can enjoy them too. It is a great place to take a picture of Sydney Opera and Harbour Bridge together.
Wikipedia https://en.wikipedia.org/wiki/Mrs_Macquarie's_Chair
Address (Unnamed Road), Sydney 2000, Australia
Coordinates -33°51'34.962" N 151°13'21.29" E