Jindo is the third largest island in South Korea. Together with a group of much smaller islands, it forms Jindo County. It is located in South Jeolla province, just off the southwest corner of the Korean peninsula. The island is separated from the mainland by the Myeongnyang Strait; however, this strait is now spanned by South Korea's longest cable-stayed bridge s…Jindo is the third largest island in South Korea. Together with a group of much smaller islands, it forms Jindo County. It is located in South Jeolla province, just off the southwest corner of the Korean peninsula. The island is separated from the mainland by the Myeongnyang Strait; however, this strait is now spanned by South Korea's longest cable-stayed bridge spanning 484 meters. Here in 1597 admiral Yi Sun-sin won the Battle of Myeongnyang, defeating a vastly superior Japanese fleet.