Hundred Islands National Park In Philippines is the important island. The Hundred Islands National Park is in the province of Pangasinan in northern Philippines. It is located in Alaminos City, Pangasinan. The islands are scattered along Lingayen Gulf and cover an area of 18.44 square km. They are believed to be some two million years old. Only three of them have been developed: Governor Island, Quezon Island, and Children's Island.