A rare scientific odyssey down the Grand Canyon through some of the most treacherous rapids on the planet. From the river cutting through two-billion-year-old stone to the creatures roaming its back-country, the Grand Canyon still has secrets to tell.

IN THE WINTER OF 1983, the largest El Niño event on record-a chain of "superstorms" that swept in from the Pacific Ocean-battered the entire West. That spring, a massive snowmelt sent runoff racing down the Colorado River toward the Glen Canyon Dam, a 710-foot-high wall of concrete that sat at the head of the most iconic landscape feature in America, the Grand Canyon. As the water clawed toward the parapet of the dam, worried federal officials desperately...

"Learn all about Grand Canyon National Park, including how it was formed, which wildlife can be found there today, and how it is affected by environmental issues."--Provided by publisher.

This travel guide to the stunning national treasure features flexible itineraries, strategic advice, the best hikes in and around the Grand Canyon and information on respectfully visiting Native American reservations, supporting local artists and the history of the region's tribes.

Yellowstone National Park is known as the enduring wonder. With its vast forests and magical hot springs, it is a treasure unlike any other Park. Yosemite National Park's valley, which has been gouged by glaciers and water, features magnificent waterfalls like Bridalveil and mountains of majesty such as Three Brothers. The Grand Canyon's ruby and gold layers of granite and limestone tell a story thousands of years in the making.

A tour through Arizona's Grand Canyon National Park introduces the park's flora, fauna, topography, history, weather, and attractions. Lee's Ferry, the Tusayan Ruins, and Glen Canyon Dam are discussed. Additional features to aid in comprehension include a table of contents, informative captions and sidebars, detailed maps, map legends, a phonetic glossary, sources for further research, and an index.