Peru is somewhat of an enigma, as it offers extreme diversities in weather and climate depending on which part of the country you are visiting. You have the coastal valleys in the west, the Andes mountain ranges in the central and southern regions (where Machu Picchu is located), and the tropical jungle to the east (part of the Amazon).
It’s no surprise that the majority of people touching down in Cusco (or Cuzco), Peru are generally there for one reason – visiting Machu Picchu. And as it is one of the seven wonders of the world, I don’t blame them (check out my post on visiting Machu Picchu)! But if you can squeeze out an extra day or two from your itinerary, I would highly recommend taking a day trip to Lake Humantay.