Most people, looking at this photo, would see oil on the ground. Pollution, or a car in need of repair.
I see magic.
When I was little, my dad told me a story about a fairy ring in Ireland. I asked whether there were any fairy rings where we lived, and he said he'd never seen one, things worked differently here.
Not long after, we were coming home from the supermarket on a rainy day and I pointed out a rainbow on the surface of the wet parking lot. He told me that was where the fairies hid when they had to live in cities.
So next time you see a rainbow on the ground, tread carefully. There are fairies underfoot.