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Castle on a hill © Tororo/Getty Images
In honor of Castle Day in Japan, we"re featuring Himeji Castle—one of the most pristine examples of traditional Japanese castle architecture, and a UNESCO World Heritage site. Castle Day is on April 6 (or 4/6) because the Japanese character for castle (城) is read as "shiro," and the Japanese pronunciation of "four" is "shi" and "six" is "ro."