Sacsayhuamán

The remains of an Incan fortress, about 2km outside the city of Cusco.  The fortress took almost a century to build, and shows off the Incan construction skills; massive stones fitted seamlessly together. Most of the upper walls were torn down by the Spaniards and used to build houses, so only the largest, most impressive rocks remain.  Today, this location is used for the annual Inti Raymi festival.