Walked up to the Opera House on the Circular Quay Warf side (this station has both ferries and multiple train lines). There were tons of little shops, and place to eat and drink. As you get closer, there's an upper and lower pavilion with amazing views of the Bridge and Opera House. On the lower section there's plenty of seating and a large bar area for a meal. The tour inside is incredible with knowledgeable guides. You may even get lucky enough to sit in as techs work on the next preformamce!