We went to see Underworld play at the Sydney Opera House tonight, and it seriously ruled. I only have three of their albums but recognised about half of the songs, and the light show was incredible!
We used the brand-new Sydney Metro to get there and back (well, part of the way since they terminate at Chatswood), the trains are automated and driverless so you can stand at the very front of the train and look directly out the front window to watch yourself zooming through the tunnels! It honestly felt like we were in a city other than Sydney, because until now we've only had the massive double-decker trains.