The Narrows in Knox County, TX. A private conservation property with a river-filled canyon. At one point, the river cuts through an exposed coral reef dating from the Late Cretaceous period (shortly before the extinction of dinosaurs).
A Photo Tour of West Texas: Where High Desert Meets High Art
A Photo Tour of West Texas: Where High Desert Meets High Art - Condé Nast Traveler. An easy two-mile hike leads between the towering walls of Santa Elena Canyon, where the Rio Grande flows between Texas and limestone cliffs in Mexico.