This is one of my all time favorite macro abstract photos. I call it groove and I think it's pretty groovy. Taken at the junkyard in my hometown, it's part of some discarded, rusting machinery. I think the colors are really beautiful and I love that curving groove.
I sometimes get funny looks when I'm crouched down in front of some piece of junk with my little point and shoot. It can take a long time to get just the right shot. I tend to approach dumpsters, alleys, and rusty objects slowly and study them carefully; it's necessary to really look in order to find these kinds of abstracts. But they are everywhere!