Each of these photos has to do with water -- that water is a stream in Stayton, OR, which is technically known as Salem Ditch... that's the name of the stream, not Stayton.
To download, click on the resolution (either 640x480 or 1024x768) which most closely matches your computer's screen resolution. If you don't know, try the 640x480.
To use them as Windows 95/98 wallpaper, view the full-sized photo, then place your mouse cursor over the photo. Right click your mouse, and choose 'Set As Wallpaper.'