Tokyo’s most iconic site is the Imperial Palace viewed from Kyuden Plaza. The bridge leading to the main gate is Seimon Ishibashi. It is commonly called Nijūbashi. A nickname is Meganebashi meaning Eyeglasses Bridge because of its stone-arch design. In the foreground is Nijubashi-moat. This is one of several defensive waterways around the 1.3 square miles of the palace grounds. In the upper right corner is the main palace. The Kyūden is reserved for official ceremonies.