Frack and ruin: Archaeologists fear drilling could obliterate Chaco connections: In recent years, advances in aerial photography have shed new light on the Chacoan landscape, illuminating how it was tied together by a road system radiating from Chaco Canyon. Some roads lead to isolated communities with similar architecture. Others lead nowhere. Scholars increasingly believe that whether they were pilgrimage routes or corridors for trade and commerce, the roads are key to finally comprehending Chaco’s reason for being.