Apo Reef of the nearest coast of the Philippine island of Mindoro. It is separated from main island by the Apo East Pass of the Mindoro Strait. Politically, the reef lies within the jurisdiction of the Province of Occidental Mindoro in Region IV-B of the Philippines and more accurately of the Municipality of Sablayan. Tourism activities are administered by local government of Sablayan and the local office of the Department of Environment and Natural Resources (DENR). Apo Reef is roughly a triangular coral atoll formation approximately from the north to the south tip, and from east to west. It is separated by
Apo-eup Unified Silla in 757, when it made up two "myeon" in Gaeryeong-hyeon: Dong-myeon and Apo-myeon. This situation continued for more than a thousand years, until the massive reorganization of Korea's local governments in 1914, at which time the two "myeon" were united into the present-day entity of Apo-eup. Apo-eup was originally part of Gimcheon County; when the county was split into Gimcheon City and Geumneung County in 1949, it became part of Geumneung County. With the reunification of city and county in 1995, Apo-eup became part of Gimcheon once more. Apo-eup is located near the heart of the national transportation