Don't try the Kelly Grade in a rainstorm. When this steep stretch of the Smoky Mountain Road is wet, its mud surface is impossibly slick. Stay in granny gear, keep a tight grip on the wheel, and hope that nobody else is coming the other way. There's no guardrail and that cliff next to your tires drops hundreds of feet straight down. The shale gives way to sandstone when the road straightens out on top of the Kaiparowits Plateau.
Every month this fall, KNAU has been taking you to places on the Colorado Plateau. They may be places you know, they may be places you've only heard of. It's a series we call Land Lines and today we're visiting Monument Valley. People come from all over the world to see this valley, one of the most evocative landscapes in the southwest. But at least one rock feature doesn't quite fit the mold of the mesas and buttes. In today's Land Lines, Rose Houk and Michael Collier explore the origins of El Capitan.