This 30,000-square-mile landscape of sandstone canyons ... seeking the most inaccessible Anasazi ruins we could find. I have roamed the Southwest for the past 15 years and have written a book ...

For David Roberts, who writes about why the ancient Anasazi people of the American West abandoned their cliffside dwellings some 700 years ago ("Riddles of the Anasazi"), one of the more ...

FILE - People cast shadows on the ancient Anasazi ruins of Chaco Culture National Historical Park in New Mexico on Nov. 21, 1996. AP Photo/Eric Draper, File) ...