Peñablanca
', officially the ' (; ; ), is a in the province of , . According to the , it has a population of people. Situated east of the provincial capital Tuguegarao, the municipality is home to the Peñablanca Protected Landscape and Seascape which contains the Callao Cave (part of the Callao Limestone Formation Paleolithic Archaeological Site), one of the province's well-known landmarks and tourist spots. It is also home to the charcoal-drawn Peñablanca petrographs. Both the Peñablanca petrographs and the Callao Limestone Formation are included as tentative sites of the Philippines for future inclusion in the UNESCO World Heritage List. The Callao Limestone  Formation has at least 93 archaeological sites that yielded stone tools of Paleolithic industry and bones and shells of animals still living in the vicinity. Geography. Barangays. Peñablanca is divided into 24 barangays. These barangays are headed by elected officials: Barangay Captain, Barangay Council, whose members are called Barangay Councilors. All are elected every three years. Demographics. In the , the population of Peñablanca, Cagayan, was people, with a density of . Government. Peñablanca, belonging to the third legislative district of the province of Cagayan, is governed by a mayor designated as its local chief executive and by a municipal council as  its legislative body in accordance with the Local Government Code. The mayor, vice mayor, and the councilors are elected directly by the people through an election which is being held every three years. Education. The Schools Division of Cagayan governs the town's public education system. The division office is a field office of the DepEd in Cagayan Valley region. The office governs the public and private elementary and public and private high schools throughout the municipality.