Sacsayhuamán an ancient citadel amidst the Peruvian Andes is an architectural marvel It was built more than 900 years ago and no living person knows how such large rocks were fitted so perfectly ...
The Chinkana tunnel network consists of enormous trenches lined with stone walls, ceilings, and carved stone beams. "The cavity would be from one meter to 2.60 meters wide by 1.60 meters high.