We continue our series on the 7 Wonders of the World, this time focusing on the history of Machu Picchu. We've looked back to understand if Machu Picchu was a temple to sacrifice virgins or just a nice get away for royalty, what factors had to be considered to keep it from washing away, how the buildings were constructed with such amazing accuracy while lacking the modern tools that seem necessary to make it happen, and how the Incas even managed to get the giant rocks up an even more giant mountain to put it all together!