It’s hard to imagine how much tribute the Inca rulers needed to build Machu Picchu. It was a city standing atop a mountain, which juts more than 1,000 feet into the air from a riverbed. How many farmers in what’s now Peru worked extra hours in their fields to support to make the indulgences of… Read More Why Build A City on a Mountain Top? Because They Could : Machu Picchu, Peru. November, 2008.