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"Machu Picchu was occupied for only about 100 years. After that, it was known solely to the locals for about 500 years until it was &amp;quot;discovered&amp;quot;. Test your knowledge of this fantastic Incan enigma."^^<http://www.w3.org/2001/XMLSchema#string>
<http://adventure.howstuffworks.com/machu-picchu-quiz11.htm>