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Machu Picchu (Quechua: Machu Piqchu Old Peak; sometimes called the "Lost City of the Incas") is a well-preserved pre-Columbian Inca ruin located at 2,430 m (7,970 ft)[1] on a mountain ridge. Machu Picchu is located above the Urubamba Valley in Peru, about 70 km (44 mi) northwest of Cusco. Forgotten for centuries by the outside world, although not by locals, it was brought back to international attention by archaeologist Hiram Bingham who rediscovered it in 1911, and wrote a best-selling work about it. Peru is pursuing legal efforts to retrieve thousands of artifacts that Bingham removed from the site.
Machu Picchu is 70 kilometers northwest of Cusco, on the crest of the mountain Machu Picchu, located about 2,350 meters above sea level. It is one of the most important archaeological centers in South America and as a consequence the most visited tourist attraction in Peru.
From the top, at the cliff of Machu Picchu, is a vertical precipice of 600 meters ending at the foot of the Urubamba River. The location of the city was a military secret because its deep precipices and mountains were an excellent natural defense.
All of the construction in Machu Picchu uses the classic Inca architectural style of polished dry-stone walls of regular shape. The Incas were masters of this technique, called ashlar, in which blocks of stone are cut to fit together tightly without mortar. Many junctions are so perfect that not even a knife fits between the stones.
The Incas never used the wheel in any practical manner. How they moved and placed enormous blocks of stones is a mystery, although the general belief is that they used hundreds of men to push the stones up inclined planes. It is unknown if the Incas left behind any documentation about that process because the writing they employed, called khipus, has not been translated.
The space is composed of 140 constructions including temples, sanctuaries, parks and residences, houses with thatched roofs.
There are more than one hundred flights of stone steps – often completely carved in a single block of granite – and a great number of water fountains, interconnected by channels and water-drainages perforated in the rock, designed for the original irrigation system. Evidence has been found to suggest that the irrigation system was used to carry water from a holy spring, to each of the houses in turn, the order being dictated by the perceived holiness of the inhabitants.
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