Colorful hot springs in Yellowstone National Park get their hues from good-luck coins tossed into their waters and trash discarded by tourists. Continue reading →
Take a tour of some of the most impressive geological features around the world.
Created in 1964, the National Wilderness system now covers about 5 percent of the United States. See National Geographic photographer Michael Melford's photos of current and proposed National Wilderness areas.
If the big volcano, which last erupted 640,000 years ago, were to blow up again, it would spew enough ash to send particles as far away as New York City. Continue reading →
Scientists obsessed with Death Valley's sailing stones have solved the Racetrack Playa mystery.
Glaciers retreat in Alaska, two tropical storms harass Hawaii and dust covers the Red Sea.
The U.S. National Park Service has an important message for visitors: Leave your drones at home!
More than 500 firefighters are battling the El Portal Fire in Yosemite National Park, which has spread across more than 3,500 acres and threatens nearby homes, campgrounds and roads.
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