While Sacsayhuamán is famous as an Inca ceremonial fortress near Cusco, its stone walls — some blocks weighing over 100 tons — show fretting joints, perfect fit, and angular cuts that resemble even ...

The Inca Empire in South America was one of the most powerful pre-Columbian societies. It was known for the architecture of Machu Picchu, an extensive road network and a system of terraces for ...