I saw the Sydney Opera House as well as the Harbour Bridge, which is said to be the world's tallest steel arch bridge and the only bridge in the world that allows tourists to climb to the top of the arch bridge. It is also an important bridge connecting the north and south sides of the harbour. It seems that the well-known Martell XO's bottle bottom design borrows from the wonderful arc design of the Sydney Bridge. I don't have the courage and energy to climb the bridge. I can only cross it by boat. It's a tribute to the world's first arch bridge.