The first area we will visit is Arches National Park, near the town of Moab in eastern Utah.

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Arches are formations that look like half a circle above an opening or hole in a rock.

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The National Park Service has counted more than two thousand arches in Arches National Park.

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Zion National Park has desert canyons and huge freestanding arches of red,pink and white rock.

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A one-hour trip in a small airplane makes it possible to see the park's red rocks, arches and flat areas where ancient Indian people once lived.

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Scientists say that most arches seen today developed within the past million years.

VOA: special.2009.04.15

The rock formations in Arches National Park are mostly a deep red color.

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Scientists say water is the most important element in creating arches.

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Arches can also appear as curved bridges between two large rocks.

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New arches form. Older ones fall away.

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Arches developed from thin rock walls.

VOA: special.2009.04.15