Wherever you’re coming from is probably much, much lower than Cusco (11,000 feet) or Machu Picchu (just shy of 8,000 feet). Stay there for at least a day or two.
The easiest way to get to from Cusco to Machu Picchu is to take the train to Aguas Calientes (the town located a few miles from the site).
The other way to get from Cusco to Machu Picchu is to walk as part of a multi-day Machu Picchu tour. Thousands of people hike to Machu Picchu each year.
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