The image you're looking at is the Bliss. It became the image for every single desktop running Windows XP in the world. Billions saw it, and it looked almost like it was Photoshopped. Charles O'Rear is the photographer of the photo and he reveals the origins of it.
The secret to the perfection seen in the image? A combination of perfect timing of the year with a eprfect sky combined. There was no retouching, no computer generated help. Just one amazing photo that probably made O'Rear tons of money.