Inca Terraces in Cusco, Peru
Oh right. The terraces. The terraces for Cusco. The terraces built specifically to decorate Cusco. Cusco's terraces. Those terraces?
If memory serves those could produce quite a bit of agriculture products.
It's a great way to get airable land
One of the things that fascinates me about pre-contact Americas are the farming techniques. Mesoamerica had chinampas (in the lakes) and South America (the mountainous area at least) had terraces.