The notable geographical features of the Grand Canyon include its vast size, intricate canyon system, and layered rock formations that expose nearly two billion years of geological history. The canyon is approximately 277 miles long, up to 18 miles wide, and over a mile deep, showcasing a variety of ecosystems and habitats. The Colorado River runs through it, sculpting the canyon and providing water resources. The Grand Canyon serves as a national park and attracts millions of tourists, illustrating nature's power and beauty.