From this picture looks amazing, yes, irrigated ancient 2000 years old. Located in the Philippines Ifugao mountain, irrigated fields known as the Banaue Rice Terraces. No heroics, but the Philippines was quite satisfied if the Banaue Rice Terraces are placed as "the Eight Wonders of the World".
It is estimated, fields that 'engraved' on the mountain this Ifugo, made with a very traditional equipment by the ancestors of the Philippines. Rice field plots are located at 1,500 meters above sea level and the surrounding mountain slopes as far as 10,360 square kilometers.
Remarkably, the ancestors have set the rice field irrigation in such a way that comes from forests that are above the rice fields. The local population today still plant a vegetable starch also in Banaue Rice Terraces.
Erosion, is one threat to the existence of this ancient rice fields. Therefore, the government is also very concerned citizens about this, as well as the reconstruction treatment is done continuously, to maintain its sustainability.