Slide Rock State Park in Sedona tests the water of Oak Creek weekly. Here's what to know about E. coli and swimming at Slide ...

Some of the Javelina Rocks, often described as layer-cake formations, at Saguaro National Park east of Tucson. — Credit: Doug Kreutz/Arizona Daily Star Doug Kreutz/Arizona Daily Star ...

This Arizona national monument boasts 13 hiking trails, unique geology, and is even a designated International Dark Sky Park; so the stargazing is unbeatable.

Last week, Samuel Adams painted the logos of all 30 Major League Baseball teams on smooth rocks and hid them in Papago Park in Phoenix, bringing the total number of rocks he's hidden in that park ...

Reporting from Death Valley National Park, Calif. — The cracking sounds were ferocious. An ankle-deep, frozen lake in Death Valley National Park was breaking apart under sunny skies. As cousins ...