It also runs the 496,000-acre Sonoran Desert National Monument in south-central Arizona, where the bureau first banned target shooting, then rescinded it and is now facing a court challenge over ...

A thin layer found in the top few centimeters of soil plays a big role in its ecology. Biocrust is built, maintained and ...

The others are the Sonoran Desert National Monument lying north of Ironwood in Pinal County and the Vermilion Cliffs National Monument in Coconino County.

Sierra Vista sits in the heart of some of the most significant historical sites in the American Southwest. The nearby town of ...

Established in 1908, the park is Utah’s first national monument. It covers over 7,600 acres, and the park’s creeks, bridges, ...

The Mojave Desert, which includes the Amargosa Basin, is already the hottest place in North America. Temperatures in Death Valley, where the river terminates, regularly top 125 degrees Fahrenheit.