UNESCO World Heritage Site in November 2000. Sabah's attractions include World Heritage Site Kinabalu Park (which includes Mount Kinabalu), and Sipadan Island (a diving and bio-diversity hot-spot). Geology Several oil and gas fields have been discovered offshore, including the Samarang oil field (1972) offshore Sabah, the Baronia oil field (1967) offshore Sarawak, and the Central Luconia natural gas fields (1968), also offshore Sarawak. The Baronia Field is a domal structural trap between two east–west growth faults, which produces from late Miocene sandstones interbedded with siltstones and clays at 2 km depth in 75 m of water. The Samarang Field produces from late Miocene sandtones in an alternating sequence of sandstones, siltstones and clays in an anticline at a depth of about 3 km in water 9–45 m. The Central Luconia Gas Fields produce from middle to late Miocene carbonate platform and pinnacle reefs from 1.25-3.76 km deep and water depths 60-100m. Population The total population of East Malaysia in 2010 was 5.77 million (3.21 million in Sabah, 2.47 million in Sarawak, and 0.09 million in Labuan), which represented 20.4% of the population of Malaysia. A significant part of the population of East Malaysia today reside in towns and cities. The largest city and urban centre is Kuching, which is also the capital of Sarawak and has a population of over 600,000 people. Kota Kinabalu is the second largest, and one of the most important cities in East Malaysia. Kuching, Kota Kinabalu, and Miri are the only three places with city status in East Malaysia. Other important towns include Sandakan and Tawau in Sabah, Sibu and Bintulu in Sarawak, and Victoria in Labuan. The 2020 estimated population is 6.8 million (3,908,500 in Sabah, 2,816,500 in Sarawak and 99,600 in Labuan). The earliest inhabitants of East Malaysia were the Dayak people and other related ethnic groups such as the Kadazan-Dusun people. These indigenous people form a significant portion, but not the majority, of the population. For hundreds of years, there has been significant migration into East Malaysia and Borneo from many parts of the Malay Archipelago, including Java, the Lesser Sunda Islands, Sulawesi, and Sulu. More recently, there has been immigration from India and China. The indigenous inhabitants were originally animists. Islamic influence began as early as the 15th century, while Christian influence started in the 19th century. The indigenous inhabitants are generally partisan and maintain culturally distinct dialects of the Malay