Ollantaytambo is about 9,160 feet above sea level and during the Inca Empire this was the royal estate of Emperor Pachacuti who conquered the region. He built  the town and a ceremonial center. &lt;br /&gt;
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In the photo you see how the Incas built  storehouses out of fieldstones on the hills surrounding Ollantaytambo. Their location at high altitudes, where there is more wind and lower temperatures, helped protect the  contents against decay. The Ollantaytambo storehouses  feature ventilation systems and grain would be poured in the windows on the uphill side of each building, then emptied out through the downhill side window.