The majestic Mt. Apo towers over the whole Philippine archipelago, being the country's highest mountain that rises to 3,143.6 meters above sea level. Its base is known to be larger than the island of Singapore. In 1982, Mt. Apo was included in the list of National Parks and Equivalent Reserves of the United Nations while the 1984 ASEAN Declaration on Heritage Parks and Reserves named it as an ASEAN Heritage Park.