Reporting from GRAND CANYON NATIONAL PARK — They were just a couple of greenhorns from Pittsburgh, but the Kolb brothers knew the greatest photo op in the West when they saw it. It was 1902.

Without a doubt, few sights in the United States are as stunning as the Grand Canyon. This world-famous natural wonder is a ...

Named for the Mariner 9 satellite that first revealed it some three decades ago, the chasm is often called the Martian Grand Canyon, though at 2,500 miles long, it is actually five times longer ...

Package Delivery Halts, But Grand Canyon's Mules Trudge On For several decades pack mules have carried mail to the bottom of the Grand Canyon, includingg postcards, letters and packages. The ...

However, what makes this "Spanish Grand Canyon" truly special ... walls that frame the river — and the Júcar Canyon viewpoint ...