The Rice Terraces of the Philippine Cordilleras were inscribed on the UNESCO World Heritage List in 1995, the first-ever property to be included in the cultural landscape category of the World Heritage List.This inscription has five sites: the Batad Rice Terraces, Bangaan Rice Terraces (both in Banaue), Mayoyao Rice Terraces (in Mayoyao), Hungduan Rice Terraces (in Hungduan) and Nagacadan Rice Terraces (in Kiangan), all in the Ifugao Province, the Philippines. Built 2000 years ago and passed on from generation to generation, the Ifugao Rice Terraces reach a higher altitude and were built on steeper slopes than many other terraces. The Ifugao complex of stone or mud walls and the careful carving of the natural contours of hills and mountains to make terraced pond fields, coupled with the development of intricate irrigation systems, harvesting water from the forests of the mountain tops, and an elaborate farming system. The terraces illustrate a persistence of cultural traditions and remarkable continuity and endurance; archaeological evidence reveals that this technique has been in use in the region for 2000 years virtually unchanged.
Maintenance of the living rice terraces reflects a primarily cooperative approach of the whole community which is based on detailed knowledge of the rich diversity of biological resources existing in the Ifugao agro-ecosystem, a finely tuned annual system respecting lunar cycles, zoning and planning, extensive soil conservation, and mastery of a complex pest control regime based on the processing of a variety of herbs, accompanied by religious rituals.