About Grand Canyon National Park: Often touted as the Eighth Wonder of the World, Grand Canyon National Park encompasses over 1,200,000 acres and lies on the Colorado Plateau in northwestern Arizona. Dominated by the spectacular Grand Canyon; a twisting, 4,000 foot deep and 277 mile long gorge formed during some six million years of geological activity and erosion by the Colorado River, it divides the park into the North Rim and South Rim which overlook the canyon from both sides. Up to 15 miles wide in spots, the views of the Canyon from these rims feature buttes, spires, mesas and temples. Many of these vantage points and natural features, such as Toroweap Overlook, Nankoweap Ruin, Point Imperial, Mount Hayden and Havasu Falls are famous in their own right. The park is also home to numerous rare, endemic, and endangered plant and animal species. Over 1,500 plant, 355 bird, 89 mammalian, 47 reptile, 9 amphibian, and 17 fish species are found in the park.