STEVE EMBER: The fourth and final park we will visit today is Zion National Park. It is not far from Bryce. But it is very different. About three million people visit the park each year. Zion National Park is an area of huge rocks that were cut through by a river. The area is really a desert, receiving only about thirty-five centimeters of rain a year.

Visitors to Zion National Park are surprised by the huge mountain structures of red, pink and white. Driving is restricted in much of the park. Instead, visitors travel in small buses that take them to areas where they can walk on paths into the wild areas.

One easy walk is almost two kilometers. It takes hikers to a clear pool of water and waterfalls. One of the more difficult walks is an eight kilometer hike that is not for anyone afraid of high places. That is because the path ends at the top of a rock high above Zion Canyon. Another hike is a twenty-two kilometer walk that ends at an unusual rock formation. Experts say it could be the world's largest free-standing arch.

FAITH LAPIDUS: Visitors who choose not to take long walks can leave the small bus at different stops. At each stop, they can walk a short path to a viewing area where they can see a different part of the park. Some of the huge mountains have interesting names.

One of the park's largest sandstone formations is known as the Sentinel. Another area includes three mountains next to each other. They are called the Three Patriarchs -- Abraham, Isaac and Jacob. They were given the names by a visiting Christian church leader in nineteen sixteen.