When installing Windows 7, you will always get asked what country you are from. Then, based on what you choose, Windows will give you wallpapers to suit your choice. If you choose United States, you will most likely get some scenic views such as the eye candy wallpaper displaying the national park and the outdoors treatment you can possibly find in the US. However, there are actually some other pieces of wallpapers that you can reveal.
These said wallpapers are stored in the C:\Windows\Globalization\MCT folder. You may need to unhide the folder if it is hidden.
To do that, you may want to push Windows key + R and type into run box %systemroot%/Globalization/MCT. If this doesn’t work click in the window Organize button, and select Folder and search options now select View tab there, you can choose to show or hide files and folders on the View tab.
Now first uncheck Hide protected operating system files and second click on Show hidden files, folders, and drivers apply and click ok, and you are done!
In the folder, you may see a few subfolders named ZA (for South Africa), US (United States), GB (Great Britain), CA (Canada) and AU (Australia). Inside each of those folders, you may find a subfolder labeled as Theme. When you get into the subfolder and run the file ending in .theme extension, you will activate the corresponding set of visual theme. You can then use this theme by right clicking on your Windows desktop and choose Personalization. You will see new themes under My Themes. Now just double click on the theme and you’re done!
However, if you find that the themes available in those folders are not quite attractive, you may want to get some additional themes from the Microsoft website. In addition to that, there is also a third party website which is pretty interesting to visit. The website author has compiled loads of wallpapers you can use for your Windows operating system.