Machu Picchu is an Inca site located on a mountain above the Urubamba river valley, about 50 miles northwest of Cusco. Also called “The Lost City of the Incas”, Machu Picchu is unique because the Spanish never found it. The city itself is very large, and there are many trails that you can hike that scale the nearby mountains. The most popular trail reaches the summits of the two mountains that frame Machu Picchu. It was constructed around 1450 and then abandoned just about 100 years later. It was discovered in 1911 by Hiram Bingham.