The Wrecks of Coron Bay in The Philippines Jan. 26th- Feb. 4th, 2019 as I cover the 75th Anniversary of the Pacific Island hoping Campaign. I will also list Apo Reef. Apo Reef is a coral reef system in the Philippines situated on the western waters of Occidental Mindoro province in the Mindoro Strait. Encompassing 34 square kilometres, it is by no means the world’s second-largest contiguous coral reef system, but is the largest in the country.