Mexico's Copper Canyon

International adventurers are drawn to the isolated canyons of northwestern Mexico to build secluded campsites beside trickling streams where the golden moon glistens each evening on green and red gorges that are deeper and narrower than those of America's Grand Canyon. These silent ravines are magnets to more than just adventurers. They attract cyclists, amateur geologists and anthropologists, landscape photographers, rafters and climbers who seem to reappear again and again, as dependably...