Article Photos: Chile's Atacama Desert: Book tours carefully

This August 2012 photo shows a man walking with his llamas down a street in San Pedro de Atacama, Chile. The town of about 3,000 residents is the gateway to activities in the Atacama Desert. (AP Photo/Karen Schwartz)

This August 2012 photo shows a man walking with his llamas down a street in San Pedro de Atacama, Chile. The town of about 3,000 residents is the gateway to activities in the Atacama Desert. (AP Photo/Karen Schwartz)