(For a friend from the UK who asked about Idaho.) Looking across a park with the foothills in the background. The park is landscaped and watered, thanks to the Boise River, irrigation canals, and the aquifer that runs under the valley. The foothills are au naturel. (Click to enlarge the photos to see the detail)
Here's a closer view of the foothills. They're green now because of the spring rains. But in the summer it's very hot and dry, so they turn brown, as in the photo below.
Can't you just see a cowboy riding over the ridge? :-)