Sepia Scenes is the monochrome meme made up of soothing sepia. I notice that many things can distract from the shapes and forms of mechanical (not organic) designs.
I had posted this view in color before, but thought that a sepia take shows the stylish US 22 bridge over the Ohio River on our way from West Virginia to Steubenville, Ohio. The modern (1997) span is a cable-stayed bridge made up of concrete and other things. As the pre-stressed concrete on the towers and roadway is already gray, sepia tones smoothes things out. The beautiful and functional shape sits before us and gracefully reaches to the sky.
See Mary's site for many more excellent monochrome styles!