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It is an amazing place. It cost us total about $5k for 2 people for 2 weeks, 1 week each in Cuzco and Arequipa. If you ever get the chance, you have to spend the money on a hotel room at the base of Machu Pichu in Aguas Calientes. You can hike to Machu Pichu or take the bus and stay all day long. We took the train from Cuzco and only got a few hours. My buddy spent a week in Aguas Calientes and had a WAY better experience in the ruins.

Thank you SO much for sharing this advice. That's awesome to know!