Region Index
The Cagayan Valley (Region II) is made up of the provinces of Cagayan, Isabela, Nueva Vizcaya, Quirino, and the Batanes group of islands. It is bordered to the west by the Cordillera mountain range, to the east by the Sierra Madre, to the south by the Caraballo Mountains, and to the north by the Luzon Strait. The main cities in this region are Cauayan, Ilagan, Santiago, and Tuguegaro.
Ilocos (Region I) lies on the northwestern section of Luzon. It also straddles part of the Central Luzon plain, primarily in Pangasinan province. It is bordered by the Cordillera Administrative Region to the east, the Cagayan Valley to the northeast and southeast, and the Central Luzon to the south. To the west lies the South China Sea. The region is made up of four provinces (Ilocos Norte, Ilocos Sur, La Union and Pangasinan) and one independent city, Dagupan.
