Providence Canyon State Park in Georgia features colorful, 150-foot gullies. Hiking is the main activity, with popular trails ...
CC0 Usage Conditions ApplyClick for more information. Millions of years ago, Las Vegas Valley laid at the bottom of an ancient sea. Movement of the earth's tectonic plates caused the water to drain ...
The origin story of Hells Canyon, North America's deepest river gorge, has long been unclear to scientists. But new research estimates it formed about 2.1 million years ago when a dramatic flood event ...