Angels Window on the North Rim of the Grand Canyon, Arizona, USA

We’re here on the North Rim of Grand Canyon National Park in Arizona. Can you see the rectangular hole in the canyon wall near the top of the image? That’s Angels Window. Brave hikers can make their way up to the trail above it, but the window itself is best viewed from various points along the North Rim. Far down below is the Colorado River. Beginning about six million years ago, it gradually carved downwards through numerous layers of rock. The Colorado and its tributary streams continue to deepen and widen the Grand Canyon even today.
© Tim Fitzharris/Minden Pictures