Korea Historic Site No. 158, 3D Asset, which is located in the sea of Yangbuk-myeon, Gyeongju, Republic of Kroea, is named after the tomb of King Munmu. The tomb of King Munmu is an underwater tomb built in accordance with the will of King Munmu, the 30th king of Silla. Unlike previous kings buried in large-scale tombs, King Munmu left a will to cremate his remains and bury them in the East Sea, and in addition, he said he would become a dragon in the East Sea to protect the country from Japanese pirates. Perhaps because of that, Silla did not suffer damage from Japanese pirates, which is rare in Korean history, until its collapse.This is made by photogrammetry skills.