The Cagayan River is known throughout the Philippines as the “Rio Grande de Cagayan” because it is the longest, largest and widest river in the Philippines. The length of the river is about 350 km and has a drainage basin covering 27,753 sq. km, flowing along the provinces of Apayao, Aurora, Cagayan, Ifugao, Isabela, Kalinga, Mountain Province, Nueva Vizcaya and…