America’s Southwest is full of breathtaking canyons, but none as famous or as widely visited as the Grand Canyon ... of our most valued national parks and wilderness areas, affecting not just how far ...

The area is not actually a canyon, however, but a series of amphitheaters which feature remarkable rock formations and extensive forests dominated with conifers, including ancient bristlecone pines.

Grand Canyon National Park — and the book you are holding— evince that truth." The Grand Canyon Conservancy, the park's official nonprofit partner, also supported this book's mission.

The Midwest's "Little Grand Canyon" in Iowa is more of a local favorite. It is not as touristy as southern Illinois' Shawnee National Forest ... Whitewater Canyon Wildlife Preserve Area.

A chlorine gas leak at Roaring Springs forced the closure of all inner canyon corridor trails at Grand Canyon National Park ... livestock, and wildlife; inorganic contaminants, such as salts ...

More often than not, national parks, although this can vary depending on circumstances, are designed and made to protect the region's natural wildlife ... the Grand Canyon in Arizona, and Zio ...