South of the border, a spectacular range of ancient volcanoes rises from the desert floor just a few miles from the Sea of Cortez. Virtually untraveled, the Sierra Pinacate in northwestern Mexico beckons adventurers and scientists. Here, in words and pictures, is a remarkable introduction to this place of almost surreal beauty. Sometimes veiled in clouds or dust storms, the Pinacate have long been shrouded in mystery as well. From prehistoric times...