Of all the trails in Washington's Alpine Lakes Wilderness, there's one traverse that's considered the crown jewel of hiking.

Learn more about how researchers track water movement through a technique called fingerprinting at Yellowstone National Park.

A tower of salty water that appears to be laced with oil is shooting roughly 100 feet into the sky just West of Toyah in ...

Florida springs offer crystal-clear waters ideal for kayaking, creating refreshing outdoor adventures where paddlers can ...

Springs that supply all the water for Summerhaven and the Mount Lemmon area north of Tucson are starting to dry up, and creek flows have slowed to a trickle. The reason: prolonged drought and a low ...

The water temperatures in all of these hydrothermal features are not the same, which is why you cannot enter most of the hot ...