The Niyo-no Ishigaki, or two-faced stone wall, is a popular tourist spot, built with stone from two different eras. Compare the characteristics of the ways these stone walls were built to learn about the technological revolutions of the time. From the special observation path built to let visitors observe the condition of damage and the progress of recovery at Kumamoto Castle, you can see and compare the Niyo-no Ishigaki and the fierce-looking Dai-Tenshu tower. Such special scenery can only be observed during the castle's reconstruction period!