APO island is a small volcanic island with an area of 12 ha 30 km from Dumaguete city and 7 km from the southeastern tip of Negros island. It resides only about a thousand people.

The island, which is part of the marine Park, long gained popularity among divers and became one of the most popular dive sites in the world. In 2008, the authoritative magazine "Sport Diver Magazine" has named APO in the top 100 most popular dive sites in the world. Its southern, Northern and Eastern shores are famous for their vast underwater walls extending to a greater depth and abundance of exotic species. Here you can see tuna, bigeye of karanka, fish-Napoleon, shark-hammer and manta rays. One of the most popular marine life APO is the clown fish, which "breeds" on the soft corals. Just around APO defined 15 interesting places for diving.

Length APO is just 1, 5 km and a width of about 1 kilometer. In the waters of the island are registered more than 650 species of fish and 400 species of corals. For visiting and APO diving and snorkeling small fee, and all collected money goes to Fund the work of the reserve, established in 1982 through the efforts of scientists from Silliman University. At the origins of the APO reserve stood Dr. angel Alcala, who settled on the island in 1951. He was the author of revolutionary at the time, the idea of designing a marine reserve around the Islands APO and sumilon sand bar to preserve their unique marine fauna. For many years he was explaining to the inhabitants of the island, as it is important to make rational use of natural resources, and what benefits they can get from this in the future.

The attraction of the island is the lighthouse, which stands on a small hill, which offers wonderful views of the island and the surroundings. The road to the lighthouse from the village APO will take about half an hour. Next to the lighthouse is inhabited by several families engaged in subsistence farming – they grow their own food and collect rainwater for drinking.