Sometimes called by locals as the "Eighth Wonder of the World", the Ifugao Rice Terraces begin at the base of the mountain range and extend several thousand feet upwards. Two of the terrace clusters in Banaue, namely Bangaan and Batad, are part of the UNESCO World Heritage inscription. It is said that their length, if put end to end, would encircle half of the globe. Built 2,000 years ago, the rice terraces manifest the engineering skill and ingenuity of the sturdy Ifugaos. They are irrigated by means of mountain streams and springs that have been tapped and channeled into canals that run downhill through the rice terraces.