It was taken at the campingsite on Spiekeroog, an german island. Spiekeroog is a very small island with a population of about 800 people. It is also a car free island wich gives it its special flair.
I took this picture with the panoramic mode on my iPhone 7 and edited the contrast curve a little bit in photoshop. What I think is really special about this picture is the fact, that it has an almost perfect sinus-curve by the connection of the rainbow and the way, wich both meet at the little wooden building, wich is a shop and a cafe and also a central spot on this campingsite.