Machu Picchu, Peru - Jeff-Kennel
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Two Spanish tourists explore Machu Picchu's Central Plaza. Incan terraces were used to grow a variety of crops like potatoes and maize to feed the 700 permanent inhabitants. The purpose of Machu Picchu, long thought to be a place of human sacrifice and an Incan hideout, is now thought by most experts to have been used as a royal retreat and place of ceremony.