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

The lunar canyons Vallis Schrödinger and Vallis Planck are extraordinarily deep, and scientists now know the valleys were ...

Zion National Park to Grand Canyon road trip guide • Discover the best route, scenic stops, travel tips, and must-see ...

In the heart of California, the Sequoia and Kings Canyon National Parks are home to some of the tallest trees on the planet.

Yellowstone itinerary is ideal for either first time visitors or long time fans of the National Park. Each day offers both ...

Lake Havasu and the London Bridge are uniquely Arizona road trip destinations. Here's why it's worth the drive and what to ...