This beautiful wallpaper shows Sunset Crater National Monument in Arizona. Sunset Crater Volcano was born in a series of eruptions sometime between 1040 and 1100. Powerful explosions profoundly changed the lives of local people and the landscape and ecology of the area. Lava flows and cinders still look as fresh and rugged as the day they formed. But among dramatic geologic features, visitors will find trees, wildflowers, and signs of wildlife.