If beginning the Inka Trail to Machu Picchu at Chilca, the trail, which here is an unpaved trail of possibly Inka or post-Inka origin, follows along the left bank of the Urubamba gorge, with views across the river of terraced farmland, snow-capped mountains, a glacial valley with a beautiful example of a terminal moraine, and small, inhabited Inca ruins. http://ping.fm/WTupW