With Mirando el mundo you have an original desktop background because although apparently it is a beautiful close-up of a female human eye if you look more closely you can discover that the pupil is formed by the planet Earth but is so subtle, elegant and discreetly manipulated photography that does not seem to be a touch-up and that is truly the shape of the eye.
The resolution of such an original screensaver, Looking at the world, is 1024x768 pixels but on the author's website you can find the same image at other resolutions, both larger and smaller.
You can free download Mirando el mundo 32, 64 bit and safe install the latest trial or new full version for Windows 10 from the official site.