There's something to be said about land art that exists on its own, and Alex Maclean's ariel photography of natural patterns across the U.S. is no exception. We picked the 15 that captivated us the most. If you're in Paris right now, check out his work at Domaine de Chaumont-sur-Loire through 4/17/12. [PetaPixel, AlexMaclean.com]