Large wide gauge

Large wide gauge is a lava tube where approximately 120 residents of Donggwang-ri lived in collective hiding for about two months starting in mid-November 1948. It was the site of fierce resistance and massacre, where the group was eventually discovered following a pursuit by the suppression forces, leading to stones being piled up at the cave entrance. Today, Large wide gauge is preserved as a historical site of the Jeju April 3 Incident and is located within the Gotjawal area of the Donggwang Ranch.