The Japanese Gun Sites, located in various parts of the Pacific, are remnants of World War II fortifications built by the Japanese military. These historical sites typically feature concrete bunkers and artillery placements that were used to defend strategic islands from Allied forces. Some of the well-preserved sites can be found on islands like Saipan, Tinian, and Guam. Today, they stand as significant historical landmarks, offering visitors a glimpse into the military strategies and the intense battles of the Pacific Theater during the war.