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 the stone-arch design. In the foreground is Nijubashi-moat. This is one of several defensive waterways encircling the 1.3 square miles of the grounds. In the upper right corner is the main palace. The Kyūden is reserved for official ceremonies.