If you've ever marvelled at the natural beauty of the Grand Canyon, you've probably thought about taking an up close and personal look at the area, too. Well, now you can! This fully updated edition of the popular Mac's field guide is both thorough and easy to use. It describes and illustrates the areas geology, and offers fascinating in-depth information on the natural history of this dramatic region. Whether you're an active explorer or an armchair naturalist, you'll be certain to enjoy this colourful, informative trip through one of the United States' natural treasures.