The red Big Bus is the low-stress way to get your bearings in Sydney, especially on a first visit. Hop on near Circular Quay and the open top deck rolls past the Opera House, through the city and out to Bondi, with commentary filling in the history as you go. You can jump off wherever takes your fancy and pick up a later bus. Grab a front-row seat upstairs for the best views, and add the optional harbour cruise to see the bridge and Opera House from the water too.