Climbing Into Copper Canyon Now the views of the river plain below became stunning. We crossed over one of the highest train trestles in the world, the river valley gaping hundreds of feet below. Onward El Chepe rocked, always higher; we rose amongst cliffs of hanging trees and flowers of vivid yellow, pink and periwinkle. See more: https://vagabond-adventure.com/library/riding-el-chepe-express-through-mexico-copper-canyon