There is nothing to see but the cracked yellow earth, wiry bunch grass, and saltbush. Nothing, that is, until a practiced eye begins spotting a scattering of tiny black and red potsherds. Their presence here, 16 miles north of Chaco Culture National Historical Park, along with their linear arrangement, as if they were used to mark a road, are part of a chain of clues that have been leading archaeologists farther and farther away from Chaco in their efforts to explain what Chaco was. The clues do, indeed, delineate a road, the Great North Road. Built around 1100 CE, it leads out of Chaco Canyon, its original purpose one of Chaco’s abiding mysteries. In Pueblo culture, roads represent spirit paths, symbolizing the journey from a place of emergence, a place somewhere to the north, often depicted as a deep hole in the ground where souls return after death. The Great North Road seems to disappear near the rim of Kutz Canyon, a yawning cleft in sandstone badlands some 50 kilometers north of Chaco Canyon.