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 ...

The Grand Canyon is Arizona's most famous landmark. Here's everything to know if you're going to visit, plus 10 interesting things to know.

Scientists have spent over a century arguing about when the Colorado River first carved through the Colorado Plateau. A diverse set of geologic studies continues to strongly support a 5–6 Ma ...

The U.S. is home to 63 national parks, and each has scenic views, geographically diverse locations and distinct flora and fauna. One of the most well-known is Grand Canyon National Park. No matter if ...