Monday marks 108 years since the Grand Canyon was declared a National Monument. It's "the one great sight which every American should see," according to Theodore Roosevelt. As the only of the Seven ...

Earth researchers have spent generations decoding the Grand Canyon, turning its cliffs and chasms into one of the clearest records of our planet’s deep past. These nine Grand Canyon facts, grounded in ...

Walk out over the Grand Canyon to peer thousands of feet downward into the red cliffs, enjoying some of the most dramatic views in all of Arizona.

Hundreds of tourists meander around Mather Point on the South Rim of Grand Canyon National Park, snapping selfies, shooting videos and taking in one of the most awe-inspiring views in the world. The ...