I've visited all 63 major US national parks. I think Great Smoky Mountains and Grand Canyon are some of the best parks for ...

We've rounded up the best Grand Canyon tours from Las Vegas, whether you seek a relaxing bus tour, a thrilling helicopter ride, or a little bit of both. Note that most of these tours require a ...

I've visited all 63 major US national parks. I think Great Smoky Mountains and the Grand Canyon are some of the best parks for beginners.

Grand Canyon of the Yellowstone is ranked #1 out of 17 things to do in Yellowstone National Park. See pictures and our review of Grand Canyon of the Yellowstone.

A dinosaur fossil has been found in an unlikely place, a hole drilled under the parking lot of a Colorado museum where ...

In geology, even small layers can tell big stories. But figuring out the origins of such small layers can be a challenge, ...