From the Sacred Valley to Machu Picchu. Photo by Thiago Jacomasso

This switchback-savvy road cutting its way through the mountains of Peru runs from the Sacred Valley town of Ollantaytambo all the way to the tourist magnet world wonder of Machu Picchu. The road allows extremely heightened tourist traffic, bringing pollution and damaged hydrology to the area along with money. Which is needed more in Peru at this time: money or conservation?