Cagayan River
…of Nueva Vizcaya, Quirino, Isabela and Cagayan; it also flows through the only Central Luzon province of Aurora. The river's headwaters are at the Caraballo Mountains of the Central Luzon at an elevation of approximately 1,524 metres (5,000 ft). The river flows north for some 505 kilometres (314 mi) to its mouth at…