As one of the Seven Natural Wonders of the World, Arizona's Grand Canyon is one of the most popular ... and its single pool is encircled by a travertine that has formed. It's also slowly getting ...

They worry that recent efforts to control the spread of smallmouth bass in the Grand Canyon by increasing pulse flows from ... the water level of Lake Powell has dropped dangerously close to dead pool ...

To reach these natural falls and pools, park near the visitor center ... If you're planning a backpacking adventure to Havasu Falls in the Grand Canyon, Mooney Falls should also be on your must ...

The canyon is a spectacular example of arid-land erosion. It is 277 miles long, up to 18 miles wide, and over a mile deep ...