Cordillera Central (Luzon) Sierra Madre Mountains, the longest mountain range in the country, through the Caraballo Mountains in Nueva Vizcaya province. During Spanish colonial period, the whole range was called "Nueva Provincia", (New Province). The Cordillera Central is the highest mountain range in the Philippines. It comprises about 1/6 of the whole Luzon island with a total area of . The highest mountain in the range, Mount Pulag, is also the highest mountain on Luzon Island at . It is officially the third highest mountain in the country after Mount Dulang-dulang and Mount Apo on Mindanao Island, the second largest island of the
Apo Kayan people Apo Kayan people The Apo Kayan people are one of the Dayak people groups that are spread throughout Sarawak of Malaysia, East Kalimantan and North Kalimantan of Indonesia. The earliest Apo Kayan people are from the riverside of the Kayan River, Bulungan Regency, East Kalimantan, Indonesia. According to the Apo Kayan Dayak legend, the Kayan people are the forefathers of which all smaller sub-ethnic Dayak people that are found along the Kayan River came from. Today, the population of the Apo Kayan people are estimated about 64,900. The Apo Kayan people group are divided into 3 sub-ethic Dayak people, namely:-