
Sacsayhuamán is a walled complex near the old city of Cusco, Peru. Located at an altitude of 3,701 meter (12,000 feet) this walled complex is a UNESCO World Heritage site that is part of the city of Cuzco. Sacsayhuamán was built by the prehistoric indigenous people of the Killke culture around 1100 AD. They were superseded by the Incas, who occupied and expanded the complex beginning about 1200 AD.
The design and construction of the walls are a feat of engineering and a mystery even today. Every piece of the limestone fits perfectly with each other that you can't fit a piece of paper in between, and the largest piece of rock is estimated to weigh almost 200 tons.
Peruvians celebrate Inti Raymi, the annual Inca festival of the winter solstice and new year near Sacsayhuamán on June 24. Some Cusqueños use the large field within the walls of the complex for jogging, tai chi and other athletic activities.



