Rising before the sun, I was out the cabin door not long after its rays started cascading on the Continental Divide. The early departure was necessary to catch the gentle morning light warming the landscape of Rocky Mountain National Park. I also wanted to snag a parking spot at Bear Lake and head up the trail.

If you've always wanted to see fireflies flash in sync, plan to visit Great Smoky Mountains National Park in early June.

On a day set aside to celebrate the Earth and the environmental movement, the Interior Department and National Park Service gave us dollars and cents.

Standing on either rim of the Grand Canyon, it's impossible not to be overcome by the sheer depth, breadth, and length of that canyon. Yet that abyss pales in size to a newly found magma chamber below Yellowstone National Park, according to new research.