Found this through Google Personalized homepage gadgets:
which features a football field with a carved wang, a few randomly captured chopper and fighter jets, a whole series of white horses, a bunch of extravagant randomness.
From the website: The MapOfStrange website is a way of recording strange, wacky, weird and wonderful anomalies, sights and oddities from Google Maps and Google Earth.
In other words, a lot of people with too much time on their hands look through cities, streets, farms, and open oceans, in high enough magnification to find these pictures to entertain a lot of other people with too much time on their hands. And by the look of those white horses, a lot of people with WAY too much time on their hands actually go out and make these things.