While a visit to the Grand Canyon is mesmerizing and worthwhile, it's not necessarily easy. We consider the closest and most ...

Looking for some bucket-list travel ideas? You can't go wrong with these natural wonders—though you might not believe your ...

The far side of the Moon has its own versions of the Grand Canyon—two of them, in fact! A new study explains how these deep ...

Five of the brightest planets will be visible to the naked eye. With help, you may even spot Uranus and Neptune.

With 22 national parks and monuments to its name, Arizona boasts some of the most astonishing landscapes in the country, from the Grand Canyon to the towering buttes of Monument ...

New research shows that when an asteroid slammed into the moon billions of years ago, it carved out a pair of grand canyons ...

This is just all kinds of outrageous. Last November, a skydiver jumped out of a helicopter, glided down into the Grand Canyon ...