Taronga Centre at Taronga Zoo is a fantastic wedding venue with stunning views over Sydney Harbour.
You can hold a lovely wedding ceremony in the rotunda area right next to the main reception venue. It's a great spot and allows your guests to have drinks & canapes in this area before walking upstairs to be seated.
There are a number of great photo locations around the Zoo itself, or you can easily drive to nearby Bradley's Head, Balmoral Beach, or even Chowder Bay and Georges Heights.