Grand Canyon
The Grand Canyon isn't just a canyon. It's a 1.8-kilometer-deep gash in Earth's crust, exposing two billion years of geological history. When you stand on the edge and look down at the ribbon of the Colorado River, you grasp the scale of time and erosion. Rock layers beneath your feet are like pages of a book written long before dinosaurs appeared.
Dimensions Hard to Comprehend
Length—446 kilometers. Width—6 to 29 kilometers. Depth—up to 1,857 meters. Numbers don't convey the feeling: standing on the South Rim, you see the North Rim—just 16 kilometers as the crow flies, but driving there requ...
