Explore the rugged terrain and rare plants at one of Arizona's newest and barely visited national monuments, a serene cactus forest in the middle of the desert.

The thinning also allows a little more of the snow and rain that falls on the forest to make its way into SRP reservoirs and then Phoenix taps, according to modeling that Arizona State University ...

The current 346 square miles of Petrified Forest open a window on an environment more than 200 million years old, one radically different from today's grassland. Where you now see ravens soaring ...