In addition to the databases on the Quick Start page that cover multiple areas and topics, the databases below will help you find more specific information:
Terraces built by the Huari people during the Middle Ages in the Colca Valley (Peru).
Malpass, Michael A.. "Historical Overview." Daily Life in the Inca Empire. Westport, CT: Greenwood Press, 1996. The Latino American Experience. Greenwood Publishing Group. 8 Jul 2010. <http://lae.greenwood.com/doc.aspx?fileID=GR9390&chapterID=GR9390-78&path=books/greenwood/>
This image was taken by the author of the article (see citation), but you can find images in lots of places. See this image guide for help.