AS THE TECHNOLOGY OF AGRICULTURE spread around the world c. 10,000 years ago, it was probably pretty simple to adopt in areas of flat land. For people living in mountains or hilly terrain, on the other hand, certain adaptations were necessary. Terracing is a type of landscaping whereby a natural slope is transformed into a stair-step of successively receding flat surfaces. This gives farmers multiple sections of arable land that: a) are more comfortable to work on, b) can be irrigated without excessive runoff, and c) are less susceptible to erosion. Terracing has been utilized in the production of various crops in different parts of the world for thousands of years. In South and East Asia, terraces predominantly serve as rice paddies. In the Mediterranean, grape vines and olive and other agricultural trees are grown. And in the Andes , terraced slopes are planted with potatoes, maize, and quinoa. But beyond their primary function as agricultural tool, terraces possess an aes...