Visitors and staff at two national parks in the U.S. West have been evacuted because of wildfires. Officials at Black Canyon of the Gunnison National Park in Colorado say the ...

Jacob Lake was being evacuated, and the North Rim of the Grand Canyon was closed to visitors because of the fast-moving White ...

It felt like paddling through soggy cereal. My wife and I were deep within Everglades National Park, struggling to kayak past dense mats of periphyton, a mass of algae, fungi and other organisms.

Canyonlands owes its existence to the mighty Colorado River, the same river responsible for the better-known Grand Canyon.