Inca Ruins of Moray* An archaeological site in Peru approximately 50 km northwest of Cuzco on a high plateau at about 3500 m (11,500 ft) and just west of the village of Maras. "The ruins at Moray are circular stone terraces that were built into existing natural craters in the earth. They were originally built in pre-Inca times. The natural earth formations have a huge variety of temperatures, depending on the depth and where the sun and shadows fall. One scientist recorded a full 15C (27F) degrees temperature difference between the top and bottom terraces, which is only 30 feet! For this reason, historians believe quite certainly that these terraces were used for agriculture experimentation, sort of like a natural greenhouse. They believe that pre-Incans used this site to develop different strains of Maize (corn), allowing them transform maize into a high-altitude crop, thereby allowing the ancient civilizations to thrive in the Andes mountains."
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12 Piano notes made visible for the first time 
