The Alab petroglyphs are ancient figures carved on mountain walls by the prehistoric people of Bontoc. The petroglyphs are the most important ancient rock art carvings in the Cordilleras and the second oldest in the entire country, second only to the Angono petroglyphs of Rizal. The Alab petroglyphs are dated to not earlier than 1500 BC, while the Angono petroglyphs are dated to the late Neolithic Age (the Philippine Neolithic Age ranges from 6000 to 2000 BC).
Due to its high significance, the site was submitted by the National Commission for Culture and the Arts of the Philippines to the UNESCO Tentative List of Heritage Sites in 2006, pending its inclusion in the World Heritage List along with the Singanapan charcoal-drawn petrographs of southern Palawan, Angono petroglyphs of Rizal province, charcoal-drawn Peñablanca petrographs of Cagayan, and the Anda red hematite print petrographs of Bohol.
- Things to Do and See in Mountain Province. WOW Philippines. (accessed on August 7, 2007).
- Annual Report 2010; National Museum.
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