The Grand Canyon is one of America’s largest, and most popular, tourist destinations. The canyon itself is composed of peaks and slopes of layers of red rock that drop down several thousand feet. At its base, the Colorado River snakes through for over 200 miles. At different times of day, the colored rocks reflect the sunlight in a variety of colors, causing the rocks to appear purple, blue, yellow, red or orange.

Source: Travel: How to Spend a Day at Grand Canyon National Park – ColumbusUnderground.com