The Agno River in the Philippines is one of the main waterways of Luzon, the most populous island in this 7,000+ island Southeast Asian archipelago. The Ago drains the Luzon highlands, which dominate the geography of northern Luzon. The river runs a length of just over 200 km (around 130 mi.), emptying into the Lingayen Gulf, an inlet of the South China Sea. In this drone video, you'll get an aerial glimpse of the river as it runs its course through Pangasinan, one of the provinces of northwestern Luzon.