Amazing walls at the pre-Inca ruins of Tiahuanaco. Tiwanaku, is an important Pre-Columbian archaeological site in western Bolivia, South America. Tiwanaku is recognized by Andean scholars as one of the most important precursors to the Inca Empire, ... Wikipedia
Archaeologists say that Peru's Wari Empire spread through trade and colonization rather than central control and conquest. The Wari, an ancestor culture to the Inca, ruled much of what is now Peru from A.D. 600 to 1000.
Puma Punku. Stones are made up of granite and diorite. Impossible to cut with the tools used in the period. Yet they have cuts straight as a perfect line. Deep and exact from one end to the other. Each weigh over 800 tons. The nearest quarry is more then 10 miles away.