Sacred Valley

It has a good agriculture. Good weather and high altitude. Good microclimate. Good source of water from the river and glacier. Fertile soil. All these reasons explains why the locals grow things well.  They are particularly known for the biggest corns in the world - 20 to 25 cm.  there are 25 different types of corns grow here. There are 3500 different kinds of potatoes. The Inca grow different kinds of potatoes, corns and quinoa according to the climate and altitudes. 

There are three different types of terraces built in these area:  Agriculture, retaining wall to prevent erosion and narrow ones like at MP that served as decoration.