| (CC) Photo: James Phelps | The Colorado river winds through Glen Canyon in northern Arizona.
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| (CC) Photo: Thomas M Parsons | The Seneca Rocks rise across the highway from the town of Mouth of Seneca, West Virginia.
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| (CC) Photo: Thomas M Parsons | The falls of the Cumberland River in the Cumberland Falls State Park in Kentucky.
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| (CC) Photo: Wing-Chi Poon | |
| (CC) Photo: Wing-Chi Poon | Large parts of the Rocky Mountains are characterized by untouched nature, such as the Glacier National Park, Montana.
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| (GNU) Photo: Sascha Brück | |
| (CC) Photo: David Iliff | Zion Canyon, Zion National Park, Utah
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