Fusions Wallpaper offers thousands of perfect high resolution wallpapers inlcuding sports, aviation, landscapes, games, films, space, art and animals.
To install one, just click on the one you want and select "Set as Wallpaper". There are around 13 categories to choose from and within those there are sub-categories. There are 103 airplanes, 82 in landscapes, 50 in digital art although in sports, cars or animals, there are relatively few.
This program continues to be updated with new images all the time adding new categories and wallpapers so you won't get bored.