What else can you do to soak in the beauty of Sydney Harbour, get some gentle exercise, and raise much-needed funds for the fabulous Sydney Institute of Marine Science? The 12km walk takes you from under the Harbour Bridge all along the Harbour foreshore past the Zoo to Chowder Bay. Then, to make it easy, you can get a boat back to your starting point.
The science displays at the end are always fabulous. Last year my kids did DNA testing on shellfish at the end of the walk.