The straight walls of Grand Canyon expose about two billion years of geologic history. The Colorado River and it's tributaries have taken 5-6 million years to carve out the canyon which is a little over 1 mile deep, 277 miles long, and 18 miles across at it's widest point. The ancient Puebloans who lived here considered it sacred- as do many current native people.
Today Grand Canyon is a hub for people seeking challenge and adventure. From rafting and kayaking the Colorado, to hiking it's miles of trails and paths, and riding mules from the South Rim to Phantom Ranch at the bottom of the gorge, Grand Canyon beckons about 5 million visitors per year.