Machu Picchu is a famous historical site from the Incans. It is one of the most visited tourists sites in South America. A 15th-century stone city tucked into a mountain-ringed valley high in the Andes, Machu Picchu is about 50 miles from Cusco, the Inca capital. Sacsahuaman the greatest Inca ruin outside of Machu Picchu, this gargantuan complex overlooks the city of Cusco Its zigzag walls are built with some of the largest stones to be found in Inca masonry; some are estimated to weigh as much as 300 tons. Tipon, a 500-acre site built around a spring near Cusco, has been called their masterpiece of water management. The intricate baths and irrigation channels still function five centuries later.