Tubbataha Reefs - It is a marine sanctuary located in the Middle Central Sulu Sea, 98 nautical miles southeast of Puerto Princesa City. Declared a World Natural Heritage site by the United Nations Educational, Scientific, and Cultural Organization (UNESCO) on December 1993, it is under protective management by the Department of National Defense (DND). It is under technical supervision by the Palawan Council for Sustainable Development (PCSD) & the Department of Environment & Natural Resources (DENR).It is located in Cagayancillo town, Palawan. Trips to Tubbattaha from mid-March to mid-June are all vessel-based and require planning for a minimum of six weeks prior to departure. To reach the place, take a 70-minute flight from Manila to Puerto Princesa City. From the airport, a shuttle bus takes you to the dive boat. Boat ride from Puerto Princesa City takes approximately 12 hours.